Science Day 4 Review

A student needs to separate a mixture of tiny dirt particles and water. Which would be the best tool or tools for separating the mixture?

• strainer

• pan balance

• filter paper and funnel

• tweezers and magnifying glass

Which of these actions can BEST limit the erosion of coastal dunes?

• planting grass on the dunes

• building groins across the dunes

• removing animals from the dunes

• moving sand from the ocean floor to the dunes

A student sorts animals into groups. He draws the animals into one group.

Which animal should the student remove from this group?

• fox

• bear

• hawk

• mouse

A student uses a microscope to study a leaf cell. The student also looks at an ant cell. Then the student draws a diagram of both cells.

Which parts does the student draw ONLY in the diagram on the leaf cell?

• nucleus

• cell wall

• cytoplasm

• chloroplast

• cell membrane

Which phrase describes a kind of weathering?

• wind blowing sand from dune to dune

• ocean waves dropping sand on a beach

• tree roots breaking rocks into smaller pieces

• a river carrying sediment across a valley floor

A student makes the solution shown in the picture.

How can the student use a change of state to separate the parts of the solution?

• by heating the solution and changing a solid to a liquid

• by heating the solution and changing a liquid to a gas

• by cooling the solution and changing a solid to a liquid

• by cooling the solution and changing a liquid to a solid

A student observes a tree throughout the year. The tree has cones. The tree has needle-shaped leaves. The leaves do not fall in the winter.

How should the student classify this tree? Select TWO answers.

• as an evergreen tree

• as a deciduous tree

• as a spore producer

• as a flowering plant

• as a coniferous plant

Which event can cause a mountain to form over time?

• a river floods

• a glacier melts

• a volcano erupts

• a river slows down at its mouth

During an investigation, a student observes bubbles forming in a substance. Which other observation would MOST LIKELY confirm that a chemical change occurred?

• the substance takes up more space

• the state of the substance changes

• the color of the substance stays the same

• the substance becomes warmer without being heated.

Which statement supports the argument that some microorganisms are harmful?

• bacteria and fungi are decomposers

• microorganisms live in soil, air, and water

• algae release oxygen as a waste product into the air

• mosquitoes can transmit protozoa that cause malaria in people