Science - ENERGY Day 7

Science - ENERGY Day 7

By KELLY COOTS

Multiple Choice

Chemical energy can be used to create change. Four kinds of chemical changes are burning, cooking, rusting, and decaying. A student wants to investigate how chemical energy changes cake batter while cooking. Which of the following forms of energy would the student use to start the chemical changes that happen when baking a cake?

• sound

• heat

• light

• mechanical

Earlier in the school year, when we were discussing different environments, we talked about mangroves. Mangroves grow along the coast of Florida, and are important for wildlife to grow. They are also important for people for recreation, such as canoeing, kayaking, and fishing.

Multiple Choice

Mangroves can live in...

• Hot water

• Cold water

• Salty water

• Dirty water

​In this video, what did you observe about the environment? Was the Sun out? Were there clouds in the sky? Was the wind blowing? Was the water moving?

Poll

Have you ever been KAYAKING before?

• YES

• NO

• NOT SURE

Open Ended

What did you like about the time you went kayaking? If you've never been, what did you enjoy about the video?

​As air heats up during the day as a result of the Sun’s energy, that air begins to rise. As hot air rises, cool air from somewhere else will move in to fill the space left behind. Then that cool air starts to warm and rise, keeping the cycle going. The movement of air is called wind. As the wind blew through the mangroves and over the water, it pushed the canoe and caused it to move. Moving air, wind, is a source of energy. In this example, the wind is one of the sources of energy to move the canoe.

Multiple Choice

What causes wind?

• differences in air pressure

• differences in gravity

• difference in oxygen

• differences in the thermosphere

Multiple Choice

Which statement correctly defines wind?

• Wind is the movement of air from areas of low pressure to areas of high pressure
• Wind is the movement of air to a colder area in the atmosphere.
• Wind is the movement of air from areas of high pressure to areas of low pressure.
• Wind is the movement of air pushed around and bouncing off Earth's surface.

​Wind turbines use the energy of the wind to move huge fan blades. As the fan blades move, the generator inside the turbine changes the energy of motion from the wind into electrical energy that can be used in homes.

Multiple Choice

5. What do wind turbines make?

• Electricity

• Heat

• Weather

• Wind

Multiple Select

Wind power is ... (choose 2)

• energy derived from the wind

• always available

• used to produce electricity

• has no disadvantages

​At the same time the wind was blowing the canoe, the water was moving, and adding to the motion of the canoe. Sometimes the water moves because the tide is moving. Sometimes the water moves because there is a current moving water from one place to another. Power dams use the energy of water moving through turbines the same way that wind turbines do. Moving water turns a generator that produces electricity.

Multiple Choice

What is hydro?

• water

• wind

• nuclear

• gas

Multiple Choice

Hyrdo Power is a __________ energy resource.

• Renewable
• Nonrenewable

Multiple Choice

What happens when water flows through a dam?

• The water evaporates.

• The water turns a turbine.

• The water is pumped back up.

• The water creates sparks making electricity.

Multiple Choice

What allows water to flow through a dam?

• The water is pumped out.

• The water constantly flows through without ever stopping.

• The water is pushed out when a motor is turned on.

• The water is released from a higher elevation to a lower elevation.

To move the canoe, a person has to produce enough energy to overcome the force of gravity pulling the canoe down. He or she has to produce enough energy to overcome the force of friction between the canoe and the water. He or she has to produce enough energy to overcome the energy of the wind and the water. That is a lot of energy needed to move the canoe.

Multiple Choice

Friction is a force that acts in an ___________ direction of movement.

• similar
• opposite
• parallel
• west

Multiple Choice

Which of the following is an example of friction that is helpful?

• Brakes used on a bike
• Tires from a car on the road
• Tread on the bottom of your shoes
• All are examples that are helpful

Multiple Choice

Which of the following is an example of friction that is harmful?

• Pencil marking on paper
• Engine parts wearing out
• sand placed on ice in the winter
• Using an eraser to erase marks

​This is why FOOD is so important. To be able to do all of that work, you need energy. Eating a healthy diet, including apples, allows you to get all of the chemical energy stored in the apple, and CONVERT it to mechanical energy to help do all of the work you need!

Multiple Choice

Which of the following is an example of chemical energy being changed into kinetic energy?

• Digested food giving you energy to jump.

• A battery giving a flashlight energy to light up.

• A hand hitting a drum making music.

• Two liquids mixed together and get hot.

Multiple Choice

A student was investigating that energy is the ability to cause motion or create change. He cooked pancakes to demonstrate that energy changed the pancake batter into pancakes. Which of the following is the source of energy that created the change in the pancakes?

• sound

• light

• heat

• mechanical