Science check T2

Which of the following is NOT an alternative energy source?

• fossil fuels
• geothermal
• hydroelectric
• wind 

Why do we depend on fossil fuels? 

• Electricity, transportation, and heating
• Food
• Sunlight
• Growing, building muscle, calcium

Wind is a __________ energy resource.

• Renewable
• Nonrenewable

What role does energy play in sound?

• Sound waves have nothing to do with energy.

• Sounds waves carry energy.

• Energy is present in loud sounds only.

• Energy is present in high-pitched sounds but not in low-pitched sounds.

What sort of frequency do high-pitched sounds have?

• high

• low

• medium

• no frequency

Two bowling balls are rolling down two bowling lanes. The white ball is traveling at the speed of 14 miles per hour. The black ball is traveling 12 miles per hour. Which statement explains the energy demonstrated in this example?

• The black ball has more energy than the white ball.

• The white ball has more energy than the black ball.

• The black ball has a greater ability to create energy than the white ball.

• The white ball has a greater ability to create energy than the black ball.

Abdullah's town relies on energy from wind to power lights in his school. His friend Ammar lives in another town that does not have a lot of wind. He doesn't understand how wind can make the lights stay on in his school. Which of the following is the best explanation Abdullah can provide to Ammar about how this works?

• Motion energy is converted to thermal energy

• Motion energy is transferred to solar energy and then to electrical energy.

• Motion energy is created by solar energy

• Motion energy is converted into electrical energy.

You live in an area where it is sunny for many days of the year. You want to create a car that is powered only by the sun. Which of the following are benefits of driving a solar car versus one that runs only on fossil fuels? Select al that apply.

• Solar energy produces less pollution than fossil fuels.

• Solar energy is a renewable source of energy.

• Solar energy is a non-renewable source of energy.

• Solar energy is more expensive than fossil fuels.

The image shows a blender mixing ingredients for a milkshake. Which of the following best explains the energy in this example?

• Electrical energy is transferred from the surrounding air.

• Electrical energy is transferred to the motion energy.

• Motion energy is transferred to the light energy.

• Motion energy is created as it transfers to the electrical energy.

Every time you go camping, your lights' don't last very long when it is night time. You want this light so you can read at the campsite. You brainstorm ways they can design a solar powered light that will last the longest and solve the problem. What steps should you take first to find the most effective solution?

• Test only the design that is the cheapest to make.

• Ask a friend which design you think will work best

• Test different designs and choose the design that works the best.

• Test only the design that is the easiest to make.