SCIENCE SKILLS REVIEW PACKET I. VOCABULARY MATCHING: COLUMN 1 COLUMN 2 a. Data collected as numbers. 1. Observations b. Data collected as words or descriptions. 2. Hypothesis c. Information from your 5 senses. 3. Responding Variable d. An assumption based on previous experience. 4. Constants e. The experimental factor being tested. 5. Quantitative f. Factors of an experiment that don’t change. 6. Manipulated Variable g. An educated guess based on observations. 7. Qualitative h. The experimental factor that is being measured. 8. Inference The amount of matter in an object. 9. Temperature j. The amount of space an object takes up. 10. Mass k. The distance between two points. 11. Density l. The amount of heat in an object. 12. Volume m. The comparison of an object’s mass to its volume. 13. Length n. Milli- 14. .01 (1/100) o. Centi- 15. 1000 (one thousand) p. Kilo- 16. .001 (1/1000) C G H F A E B D L I M J K O P N

II. MEASUREMENT & LAB EQUIPMENT: Fill in the missing boxes in the following chart. WORD BANK MASS VOLUME TEMPERATURE LENGTH METERS LITERS TRIPLE BEAM BALANCE THERMOMETER OBJECT DATA UNITS INSTRUMENT WHAT IT MEASURES Box 58.7 cm3 ruler (LxWxH) Flag pole 118.2 meter stick Paper Clip 2.6 grams Milk 83.7 graduated cylinder liquid volume Air 20.0 °C VOLUME METERS LENGTH T-B BALANCE MASS LITERS THERMOMETER TEMPERATURE

III. DENSITY: D= M/V a. A substance has a mass of 10g & a volume of 10mL. What is the density of this substance? b. What is the identity of the substance in a? c. An object has a mass of 50g & a volume of 10mL. What is the density of this object? d. If the object is placed in water, will it sink or float? e. An object has a mass of 10g & a volume of 50mL. f. If the object is placed in water, will it sink or float? 1 g/mL WATER 5 g/mL SINK 0.2 g/mL FLOAT

IV. LAB SAFTEY: Explain 3 safety precautions that should be used in the situation shown. SAFTEY PRECAUTION WHY IT IS NECESSARY WEAR GOGGLES EYE PROTECTION WEAR GLOVES IN CASE OF BOIL OVER CLEAR WORK AREA PROTECT EQUIPMENT & PEOPLE

V. READING COMPREHENSION: Read the paragraph & answer the following questions. Scientists observed that white mice that were fed seeds seemed to grow more than mice fed green vegetables. They wondered what caused the difference in growth. The scientists hypothesized that the protein in the seed was responsible for the growth. They designed an experiment to test the hypothesis. They divided 200 mice of the same age, size, health, & gender into 2 groups of 100 mice each. The mice were kept under identical conditions for 14 days. One group was given a low protein diet of vegetables, & the other group was given a normal protein diet of seeds. The mass of each mouse was recorded for 14 days. a. State the problem: HOW DOES A PROTEIN DIET AFFECT MICE? b. What is their hypothesis? IF PROTEIN HELPS MICE GROW, THEN MICE FED SEEDS WILL GROW LARGER THAN MICE FED VEGETABLES. c. The manipulated (independent) variable is different DIETS. d. The responding (dependent) variable is different GROWTH. e. The constants are the same MICE (AGE, GENDER, SIZE, HEALTH) & CONDITIONS. f. Is the data quantitative or qualitative? Explain. QUANTITATIVE- ALL THE DATA ARE NUMBERS (MASS). g. If the scientists did not notice any differences in the growth of the different groups of mice, what should they do? REJECT THE HYPOTHESIS & TRY AGAIN.

VI. REVIEW QUESTIONS: Which statement is an inference? 1. A student visits a stream. The student writes down 4 statements in his notebook. Which statement is an inference? a. The maximum water depth is 8.7 m. b. The water is so clear that I can see the bottom. c. The stream was formed during the last Ice Age. d. The water temperature is 16 °C. 2. A student is rolling a ball down a ramp. Which statement is an observation? a. If the ramp is steeper, then the ball will roll faster. b. Friction slowed the ball. c. Gravity caused the ball’s motion down the ramp. d. The ball rolled 86.3cm in 3.0 seconds. 3. Which set of items could be used to make observations during an experiment? a. sight, ruler, stopwatch c. sight, touch, textbook b. sight, graph paper, calculator d. touch, ruler, notebook

4. An orderly process used to solve problems & investigate the world is __________. a. technology b. the scientific method c. prediction d. theory 5. A student decides to enter a science contest that requires an original research project. What is the first step she must take in doing the research? 6. The information that has been collected through observation & measurement is called: 7. In an experiment, the factor that is being tested & changed is the _______. 8. Diagrams, tables, & graphs are used by scientists mainly to ____________. a. Design an experiment c. State the problem as a question. b. Write a conclusion. d. Collect data in an organized chart. a. data b. conclusion c. variables d. theory a. data b. control c. variable d. inference a. design an procedure c. organize data b. Test a hypothesis data d. Predict the independent variable

9. All of the following are safe procedures to follow when heating a beaker of water except: 10. The length of a sneaker is best measured in __________. 11. The mass of a very large boulder is best expressed in __________. a. use heat-resistant gloves b. watch the beaker as it is heated. c. remove your goggles when you put the beaker on a hot plate. d. Keep the counter clear a. mm b. cm c. m d. km a. milligrams b. centigrams c. grams d. kilograms