Water and Weather Unit Week 13 Directions 1.Prepare your desk for science. 2.Use voice level 0 (no voice) to look at notebook pg Focus on the question and hypothesis for our experiment. Read through the procedure and think about what you think will happen to the state of water each day.

Targets & Warm Up Targets: Students will discover how and why water changes state. Students will determine how air interacts with the atmosphere. Warm Up: What do you predict happened to the liquid water after we put it in the freezer and took away its heat energy? Discuss the temperature and height of the water.

Experiment Day 2 We will measure the temperature and water height… – After freezing – When ice began to melt – When all ice was melted

States of Water Experiment Question: How does heat energy affect the state of water? Hypothesis: If the heat energy applied to water changes, then the state of water will change.

Experiment Procedure 1.Fill the cup with water to a height of about 30 mm. 2.Place the thermometer inside of the cup. 3.Record the height and temperature of the water. 4.Freeze the water overnight. 5.The next day, record the height and temperature of the water. 6.When the ice just begins to melt, record the height and temperature. 7.When all the ice has melted, record the height and temperature. 8.Leave the cup at room temperature. Record the height and temperature for 3 more days.

Analysis

Table of Contents DateTitlePage Atmosphere and Air Pressure40 Once you are finished with the Table of Contents, go to page 40 and add the title and date to the top of the page.

Earth’s Atmosphere (pg. 188)

Invisible Gases in Earth’s Air

Which location would have more water vapor in its atmosphere?

Pressure

Air is pressing down on you right at this very moment! This is called air pressure. Can you feel it?

Particles All matter is made up of very small particles. The particles are much too small to observe with your eyes.

Air (Gas) Particles

Earth’s Atmosphere Gravity pulls air towards Earth’s surface. The pushing force of air is called air pressure. Air pressure decreases as you go higher in the atmosphere.

Air Pressure

Air pressure also changes with temperature. Air near Earth’s surface can warm or cool

If air near Earth’s surface warms… Air particles move further apart Air rises Area of low pressure forms

If air near Earth’s surface cools… Air particles move closer together Air sinks Area of high pressure forms The air is dense because the air particles are closer together, so there are more particles in a certain area!

High vs. Low Pressure High pressure often brings fine weather. Low pressure draws moisture from the ground, creating clouds, rain, and storms. Air warmsAir cools

Air Pressure and Wind Air moves from a place with high pressure to a place with low pressure. The moving air is called wind.

Gravity & Air Pressure video

Reflection Questions What is air pressure? When air warms, what happens to the air particles? Where does the air go? What type of air pressure is there? What is the weather like? When air cools, what happens to the air particles? Where does the air go? What type of air pressure is there? What is the weather like?

Revisit Experiment

Targets (Revisited) Targets: Students will discover how and why water changes state. Students will determine how air interacts with the atmosphere.

Homework SubjectHomeworkDue Date ScienceWksht pg. 56A & 57AFriday