What do you know about Science?

From the food she has eaten. From the exercise she did earlier. Kara is pushing her bicycle up a hill. Where does Kara get the energy to push her bicycle? From the food she has eaten. From the exercise she did earlier. From the ground she is walking on. From the bicycle she is pushing. 1

It froze. It melted. It condensed. It evaporated. It rained early in the morning. A student sees a puddle of water on the sidewalk when she travels to school. The water in the puddle is gone when she travels home. What happened to the water in the puddle? It froze. It melted. It condensed. It evaporated. 2

If all of the fish are removed from this food web, which animal population will most likely decrease first? Turtles B. Mosquito larvae C. Pelicans D. Dragonfly larvae 3

Which two planets are closest to Earth? Mercury and Saturn Mars and Jupiter Mercury and Venus Venus and Mars 4

vibrations. electrical currents. heat energy. a magnetic charge. Sound is made when a drumstick hits the drum. This happens because the force of the drumstick on the drum causes … vibrations. electrical currents. heat energy. a magnetic charge. 5

Which of these refers only to living things? clouds, fire, rivers fire, rivers, trees rivers, birds, trees birds, trees, worms 6

People wear hats when outside in the winter. How do hats help people stay warm? Hats stop thermal energy from leaving their heads. Hats slow down the thermal energy leaving their heads. Hats stop cold from entering their bodies through their heads. Hats slow down cold from entering their bodies through their heads. 7

Which of these best represents Mars? Q R S T 8

one day one week one month one year About how long does it take Earth to make a complete rotation on its axis? one day one week one month one year 9

glass metal rubber plastic Which of these is a good conductor of electricity? glass metal rubber plastic 10

A car skid more on a wet road than a dry road. This happens because between the tires and the dry road, there is more … gravity magnetism friction heat 11

Light traveling through a pair of eyeglasses is … refracted transmitted absorbed reflected 12

Which of the following can be attracted to a magnet? gold ring glass marble iron needle wool sock 13

MOST likely to find such a bird? This is a drawing of a bird’s foot. Where would you be MOST likely to find such a bird? forest lake desert meadow 14

What is the mass of the ants? Will ants go to a dark or light area? This experiment was probably set up to answer which of the following questions? What is the mass of the ants? Will ants go to a dark or light area? How many kinds of ants are there? Where do ants get food? 15

Which travels fastest? a train an airplane sound light 16

What tool is used to find the temperature at which water boils? 17

The battery would lose its charge. The glass would crack. The wires connecting the battery and the lightbulb create a closed circuit. What would happen if one of these wires were cut? The battery would lose its charge. The glass would crack. The light would go out. The wire would become hot. 18

John kept some seeds on moist cotton in a dish. Mike put the same kind of seeds in a dish beside John’s dish, and covered them with water. After two days, John’s seeds sprouted, but Mike’s did not. Which is the most likely reason? Mike’s seeds needed more air. Mike’s seeds needed more light. Mike did not put the dish in a warm enough place. Mike should have used a different kind of seed. 19

What is the approximate diameter of this coin? 2 millimeters 2 centimeters 2 meters 2 kilometers 20

Which of these questions can be answered from the results of this experiment? Do beans need light in order to grow? Can beans grow faster in groups of eight? Does seawater affect bean growth? How much water is needed for beans to grow? 21

The moon produces no light, and yet it shines at night. Why is this? The moon reflects the light from the Sun. The moon rotates at a very high speed. The moon is covered with a thin layer of ice. The moon has many craters. 22

A. B. D. C. Which experiment would best show how different methods of plowing fields on a hill affect erosion? A. B. D. C. 23

A beam of light strikes a mirror as shown to the right. Which picture best shows what the reflected light would look like? 24

In a box there is a mixture of iron filings and sand. Which is the easiest way to separate the iron filings from the sand? Pour water on the mixture Use a magnifying glass Use a magnet Heat the mixture 25

What is the mass of these rocks? 10 grams 17 grams 19 grams 22 grams 26

B. A. C. D. An uncovered bowl of water was placed in the refrigerator. Each day the amount of water left in the bowl was recorded. Which graph probably shows the results? B. A. C. D. 27

When a coin is dropped, it falls to the ground. As the coin falls, it loses potential energy and gains what kind of energy? kinetic chemical electrical solar 28

The picture shows the process of … melting boiling condensing freezing 29

Which part of a jackrabbit most helps it escape predators? long legs thick fur short tail small head 30

On the prairie, the herbivores would compete most for … oxygen space grass soil 31

The prairie is ideal for the growth of grasses because it has rich top soil. All of these processes help form topsoil EXCEPT … decay of trees weathering of rocks erosion of hills movement of oceans 32

Which of these would be the best way to find whether a softball will roll down a hill faster than a basketball? Determining which of the balls has the greatest mass. B. Observing the balls rolling down the same section of a hill at the same time. Throwing the balls into the air at the same time to see which goes higher. Dropping the balls from the same height and observing which hits the ground first. 33

radiant reflected refracted radar When light hits an object, the rays can pass through it, bounce off it, or be absorbed by it. Light rays that bounce back are … radiant reflected refracted radar 34

Which of these is a process that allows plants to convert light energy into food energy? reproduction excretion digestion photosynthesis 35

Which material will sound travel through the fastest? water air steel cloth 36

The moon revolves around … itself the Earth the Sun the solar system 37

The picture shows a block of wood floating in fresh water. If this block of wood were placed in salt water from the ocean, which picture shows what would happen? 38

A student wants to find out which type of soil holds the most water. He uses four identical pots with holes in the bottom. He fills each pot with a different type of soil and waters the pots with the same amount or water. How can he find out how much water stays in the soil in each pot? By planting seeds and measuring plant growth. By measuring the amount of water that drains from each pot. By observing which soil looks wettest after the water has been added to the pots. By feeling the soil before and after adding water to each pot. 39

A. B. D. C. Which of the following thermometers shows the boiling point of water in a pan? A. B. D. C. 40

The rotation of the Earth on its axis causes … seasons years months days 41

Sound waves travel best through … gases liquids solids vacuums 42

The substance that makes plants green is known as … water calcium chlorophyll carbon dioxide 43

To find out whether seeds grow better in the light or dark, you could put some seeds on pieces of damp paper and … keep them in a warm, dark place. keep one group in a light place and another in a dark place. keep them in a warm, light place. D. put them in a light or dark place that is cool. 44

an egg shell a plastic cup a paper plate an orange peel Some things were buried in wet ground. Several years later they were dug up. Which thing is MOST likely to have stayed the same? an egg shell a plastic cup a paper plate an orange peel 45

Which of these will happen if the temperature of a metal pan is increased? The pan will begin to lose heat. The molecules of the pan will move faster. The metal will change into another metal. D. The pan will contract. 46

When a glass jar is placed over a lighted candle, the flame goes out. Why does this happen? carbon dioxide is trapped in the glass it gets too hot in the glass the oxygen will be used up the glass makes it cold 47

Which picture does NOT show an insect? 48

Four children can feel and smell an object inside a bag, but they cannot see it. Which of the following is NOT an observation about the object? “It is flat at one end and round at the other end.” “It smells like peppermint.” C. “It has a bump on it.” D. “I hope it is candy.” 49

Ken put a thermometer in a glass filled with hot water. Why does the liquid inside the thermometer rise? Gravity pushes it up. Air bubbles are released. Heat from the water makes it expand. Air pressure above the water pulls it up. 50

Some children were trying to find out which of three light bulbs was brightest. Which one of these statements gives the best START toward finding the answer? “One bulb looks brightest to me, so I already know the answer.” “All the bulbs look bright to me, so there cannot be an answer.” “It would help if we had a way to measure the brightness of a light bulb.” “We can take a vote and each person will vote for the bulb he thinks is the brightest.” 51

damp and light dry and light damp and dark dry and dark Here is a picture of the inside of a box. If you put a worm on the bottom of the box, to which corner would you expect it to go? damp and light dry and light damp and dark dry and dark 52

The Sun is bigger than the moon, but they appear to be about the same size when you look at them from the Earth. Why is this? The moon shines only at night. The Sun is rotating. The moon is closer to the Earth. The Sun is higher up than the moon. 53

ice mountains oceans deserts When the Earth is seen from outer space, it looks mainly blue. This is because most of the Earth is covered with … ice mountains oceans deserts 54

barometer prism microscope thermometer Which object helps people understand what makes up white light? barometer prism microscope thermometer 55

landslides tornadoes hurricanes blizzards The Earth’s surface can change either quickly or slowly. Which of these can happen when rocks and soil in the Earth move suddenly? landslides tornadoes hurricanes blizzards 56

How is the Earth different from all of the other planets? It has a breathable atmosphere. It has a rocky surface. It is warmed by the Sun. It rotates on its axis. 57

magnifying glass mirror prism lens Which of the following would reflect rather than refract light? magnifying glass mirror prism lens 58

rubber glass metal newspaper Which of these materials is a good conductor of electricity? rubber glass metal newspaper 59

Fossil fuels are usually found … in the atmosphere below ground at the surface of the ocean on mountain peaks 60

All of these are consumers EXCEPT a … butterfly wasp bullfrog tree 61

wood brick copper plastic Which of these substances conducts electricity the best? wood brick copper plastic 62

weathering air currents earthquakes movement of fish Which causes rocks in a stream to be smooth? weathering air currents earthquakes movement of fish 63

clear window glass your eyelids solid wood door white paper Which of the following materials is transparent? clear window glass your eyelids solid wood door white paper 64

humidity atmosphere precipitation barometric pressure Rain, Snow, Sleet Which weather term best describes the words above? humidity atmosphere precipitation barometric pressure 65

electrical mechanical chemical nuclear The energy used to move most bicycles is an example of what type of energy? electrical mechanical chemical nuclear 66

A group of students was preparing an activity to determine whether certain materials will float or sink when placed on water. Before the experiment started, one student said, “I think the sponge will float.” This statement was … a conclusion a fact an observation a prediction 67

reflects the sunlight absorbs heat causes evaporation A shiny aluminum screen can be placed on the windshield of a parked car. This screen helps to keep the car cool because it … reflects the sunlight absorbs heat causes evaporation conducts electricity 68

Why is photosynthesis important for plants? It collects sunlight which is used to make food for plants. B. It gets rid of plant waste products. It changes plant sugar into stronger chemicals. D. It helps attract insects to plant flowers. 69

During a thunderstorm, you see the lightning before you hear thunder. That is because… light has a greater mass than sound. B. sound has a longer wavelength than light. light travels faster than sound. D. sound and light travel at the same speed. 70

If the Earth moved farther away from the Sun, which of these would probably happen? There would be no moon. There would be more solar eclipses. There would be colder weather. There would be more seasons. 71

Which of the following would be safe to do during a lab activity? running in the classroom leaving a water spill on the floor touching hot surfaces following lab rules 72

Butterflies get food from the flowers of a plant. They also lay their eggs on the leaves of the plant. As the caterpillars develop, they eat the leaves of the plant How does the plant benefit from butterflies? Butterflies help the plant grow larger flowers. Butterflies’ eggs help the leaves to fall off the plant. Butterflies help pollinate flowers so that seeds can form. Butterflies help add nutrients to the nectar of the flowers. 73

5 centimeters 3 inches 5 inches 2 centimeters This plastic rain gauge is shown before and after a rainstorm. About how much rain fell in the rain gauge during the storm? 5 centimeters 3 inches 5 inches 2 centimeters 74

Which of these is being changed from a solid to a liquid? 75

Which roller coaster will not have enough kinetic energy at the bottom of the first hill to carry the car over the second hill? 76

A periscope works by using the reflection of mirrors. Sara made several periscopes for watching baby birds in a nest. Which periscope will work? 77

Which picture shows the book with the most potential energy? 78

Rubber ball, plastic comb, nail This instrument can be used to see if materials conduct electricity. Which of these groups contains items that could all conduct electricity to complete the circuit? Rubber ball, plastic comb, nail Paper clip, penny, screw Cork, dollar bill, tweezers Pencil, eraser, spoon 79

Which form of energy is best shown in this picture? mechanical electrical chemical nuclear 80

The picture shows a comb that was used on a cold, dry day. Which of these cause the bits of paper to be attracted to the comb? Magnetic forces Static electricity Chemical reactions Heat differences 81

less expensive than steel. Many electrical wires are wrapped with a plastic coating because plastic is … less expensive than steel. more dense than copper. able to keep its shape. a good insulator. 82

Which of these best shows kinetic energy? 83

Blowing through a straw will produce a sound. Which straw will make the highest pitch? 84

Owls Snakes Rabbits Hawks According to this food web, which type of animal will die out if all of the mice and voles are killed? Owls Snakes Rabbits Hawks 85

From where does the energy for this ocean food chain come? Ocean waves The sun Whales Salt 86

The eyespots on this butterfly’s wings allow it to … stay warm. locate nectar-filled flowers. fly away quickly. frighten or confuse enemies. 87

In order for energy to flow through this food web from the sun to the yellow perch, the perch must … eat pond grass and algae. live in warmer areas of its habitat. go through the process of photosynthesis. eat the valve snail or the mosquito larva. 88

Wave action against solid rock can cause changes in the rock structure. What is the correct sequence of erosion of these rock surfaces? D, B, C, A B, C, D, A A, B, C, D D, C, B, A 89

This girl is looking at the flag early in the morning. The sun rises in the east. In which direction is she facing? North East West South 90

Rocks which formed in areas once covered by oceans often contain fossils of animals which lived in the sea. Which of these rocks contains fossils of ocean animals? 91

Which of the following is the next phase of the moon? 92

changes in temperature. If this device was placed outside, it could be used to show… changes in temperature. the amount of rainfall. changes in humidity. the speed of the wind. 93

The diagrams show how a river can cause the erosion of land. Which sequence of letters best shows how the river has aged from youngest to oldest? A, B, D, C D, A, B, C A, D, B, C C, B, D, A 94

The time between today’s sunrise and tomorrow’s sunrise would be about … 12 hours 24 hours 36 hours 48 hours 95

organisms were like in the past Geologists learn what organisms were like in the past by studying … minerals water fossils atmosphere 96

Which of these best shows that the Earth revolves around the sun as the moon revolves around the Earth? 97

What is the length of the tadpole? 2.8 cm 3.1 cm 3.5 cm 4.0 cm 98

Which of these animals eats aphids? Grasshoppers Snails Lizards Ladybugs 99

What causes the seasons on Earth? movement of Earth around the Sun movement of the Sun around the Earth tilting of the Earth’s axis rotation of the Earth on its axis 100

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