WCAS Science Daniel

Many different energy sources are used to produce electricity. The Amount of Carbon Dioxide Released graph shows the amount of carbon dioxide gas released by some energy sources, in grams per kilowatt hour (g/kWh). Which change in energy source would cause the greatest DECREASE in carbon dioxide released?

• replacing natural gas with coal

• replacing nuclear with natural gas

• increasing wind and reducing nuclear

• increasing hyrdoelectric and reducing coal

A student uses a mirror to see a cat on the other side of a wall as shown in the Path of Light model. Select 2 changes that could prevent the student from seeing the cat

• removing the wall

• removing all light from the room

• hanging the mirror on the wall between the student and the cat

• switching the current mirror with a larger mirror

Tags

NGSS.MS-PS4-2

A student stood quietly in a field observing a rabbit eating grass. The student moved and stepped on a twig. The twig broke, which made a loud sound, and the rabbit ran away. When the rabbit heard the twig break, what happened first?

• The rabbit acted, by running away

• The rabbit's brain processed the auditory information

• The rabbit's brain sends a message to its muscles to act

Tags

NGSS.MS-LS1-8

Goldfinches are small birds that eat the seeds of sunflower plants. Sunflower seeds provide goldfinches with the energy they need to survive. Which of the following 2 statements must also be true?

• Goldfinches use energy from the sun to make sunflower seeds

• Energy transfers to goldfinches when goldfinches eat sunflower seeds

• Sunflower plants use energy from the sun to produce sunflower seeds

• Energy from sunflower plants transfers to the sun to make sunflower seeds

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following is an example of a chemical change?

• Ice melting into water

• Mixing salt and water

• Cutting paper into smaller pieces

• Burning wood to ash

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the function of the heart in the human body?

• Pumping blood

• Digesting food

• Breathing air

• Thinking thoughts

Tags

NGSS.MS-LS1-3

What is the difference between a solid, a liquid, and a gas?

• Solids have a fixed shape, liquids take the shape of their container, and gases have no fixed shape

• Solids take the shape of their container, liquids have a fixed shape, and gases expand to fill their container

• Solids have no fixed shape, liquids take the shape of their container, and gases have a fixed shape

• Solids have a fixed shape, liquids expand to fill their container, and gases take the shape of their container

Tags

NGSS.MS-PS1-4

What is the role of chlorophyll in plants?

• Absorbing carbon dioxide

• Absorbing water

• Absorbing sunlight for photosynthesis

• Absorbing nutrients from the soil

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the primary cause of tides on Earth?

• The gravitational pull of the Sun

• The gravitational pull of the Moon

• The rotation of the Earth

• The rotation of the Moon

Tags

NGSS.MS-PS2-4

Which simple machine is best suited for lifting heavy objects?

• Lever

• Wheel and axle

• Pulley

• Inclined Plane

Tags

NGSS.MS-PS2-1