DCA 1 Review

Which example describes one way that a person can release less pollution into the air?

• burning trash in the backyard instead of burying it in a landfill

• driving a car to the store instead of walking to the store

• opening a window to feel a breeze instead of using an electric fan

• recycling a plastic bottle instead of reusing the plastic bottle

The image shows three containers filled with the same type of liquid.

Which physical property of the liquid is affected by the types of containers used?

• shape of the liquid

• volume of the liquid

• movement of the liquid particles

• size of the liquid particles

The image shows a plantain lily that can grow in shady areas.

Which characteristic of the lily helps it survive in shady areas?

• grows low to the ground

• grows near other lily plants

• has wide leaves that lie flat

• has leaves with pointed tips

Which is always true about an invasive species found in an area?

• The species is harmful to humans

• The species is a food source for animals

• The species is native to the area and is not found in another country

• The species is not native to the area and is harmful to the ecosystem

Students pour vegetable oil into a pan of water and then test different materials to measure how well they remove the oil. Which real-world problem are teh students attempting to solve?

• cleaning animals' habitats affected by pollution

• repairing damage to homes caused by floods

• protecting plants affected by diseases

• stopping wildfires caused by lightening strikes

Which statement best describes one property of solids?

• Solids are made up of particles that move around very quickly.

• Solids fill the space that is available in a container

• Solids change shape to match the size of a container

• Solids have a defined volume that can be measured

What is the purpose of photosynthesis?

• Photosynthesis breaks down food to provide energy for a plant

• Photosynthesis forms carbon dioxide and water for a plant

• Photosynthesis produces food for a plant

• Photosynthesis provides protection for a plant

A food web of an aquatic ecosystem is shown.

Which change to the ecosystem would cause the mayfly population to increase?

• A new species is introduced to the ecosystem that eats water fleas and is eaten by frogs

• A new species is introduced to the ecosystem that eats water plants and is eaten by snails

• A new species is introduced to the ecosystem that eats water plants but does not eat snails

• A new species is introduced to the ecosystem that eats herons but does not eat fish

The diagram shows a substance at two different temperatures.

Which graph shows the motion of the particles in the substance as the temperature changes from 30 degrees celsius to 40 degrees celsius?

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Which is true about all types of matter?

• All types of matter are visible

• All types of matter are solids

• All types of matter are made of molecules

• All types of matter are made of atoms.