LEAP Review 2

Science as Inquiry

100

Della has a mixture of soil and water in a jar. Which of the following tools would best help Della separate the soil from the water? A. a filter B. a measuring cup C. a balance D. a magnifying glass

A. a filter

200

Which tools should you use to find out how long it takes a tray of ice to melt and reach a temperature of 10 degrees Celcius? A. telescope and beaker B. watch and centimeter ruler C. scale and thermometer D. watch and thermometer

D. watch and thermometer

300

Choose the investigation that would BEST answer the question: Does the length of a string change how fast a pendulum swings? a. tie two different weights to two identical strings. b. tie identical weights to two strings of different lengths. c. tie two different weights to a string. d. tie identical weights to a long string.

b. tie identical weights to two strings of different lengths.

400

How does too much fishing in an area affect its ecosystem? A. The fish will lay many more eggs to replace the fish that were caught. B. Organisms that the fish eat will become endangered. C. Organisms that eat the fish could become endangered due to starvation.

C. Organisms that eat the fish could become endangered due to starvation.

500

Susan wanted to see which brand of paper towel was the strongest. She bought 4 different brands and used sheets of the same size for her experiment. She dampened each sheet, squeezing out any excess water. For each trial, she got a friend to hold the edges of the damp sheet while she counted how many pennies it would hold before tearing. What is the variable in this experiment? A. the amount of water she put on each sheet B. the cost of each brand C. the brand of paper towel D. the size of each sheet

C. the brand of paper towel

Earth & Space Science

100

At what time on a sunny day will the shadow of the school’s flagpole be the shortest? a. sunrise b. noon c. mid-afternoon d. sunset

b. noon

200

Anna wants to find out how weather changes. Everyday she watches the sky. What should she do next? A. Read a book about snow. B. Build a small telescope. C. Keep a record of what she sees. D. Wait for a full moon.

C. Keep a record of what she sees.

300

What causes a lunar eclipse?

Earth blocks light from the Sun.

400

Fossils are usually found in A. rocks. B. minerals. C. crystals. D. water.

A. rocks.

Science & the Environment

100

An ocean, a forest, and a grassy meadow are each examples of a complete ecosystem. Complete ecosystems contain only a. animals b. rocks and water. c. living and nonliving things. d. populations of plants and animals

c. living and nonliving things.

200

A wetland was drained to build a mall. Two years later, there were no more toads in that area. Why did the toads disappear? A. The toads were destroyed by the construction equipment. B. The toads got their food from the wetland ecosystem.

B. The toads got their food from the wetland ecosystem.

300

Which of these is a nonliving thing? A. a mushroom B. a tree C. a worm D. a river

D. a river

400

An environmentally safe way to reduce the amount of trash in a landfill would be to A. recycle glass and metal B. burn yard and food waste C. bury metal and glass D. dump paper and plastic into the ocean

A. recycle glass and metal

500

Which of these objects CANNOT be easily recycled? A. Newspaper B. Battery C. Soda can D. Milk container

B. Battery - because it is made up of more than one material.

Life Science

100

In the ocean, many large fish feed on small fish. The large fish are examples of A. decaying organisms. B. bottom feeders. C. predators. D. producers.

C. predators.

200

The distinctive color pattern of viceroy butterflies helps members of their species to A. reduce water loss. B. avoid being eaten by predators. C. locate food. D. control their body temperatures.

B. avoid being eaten by predators.

300

Which does NOT directly help an animal break down food? A. the lungs B. the teeth C. the small intestine D. the stomach

A. the lungs

400

What gas do living plants give off that other living things need to live?

oxygen

500

Where do organisms that make their own food get their energy from?

the sun

Physical Science

100

Jeannie put her soccer ball on the ground on the side of a hill. What force acted on the soccer ball to make it roll down the hill? A. magnetism B. friction C. electricity D. gravity

D. gravity

200

Which type of force requires contact between two objects for one to push or pull the other? A. frictional forces slowing down a rolling soccer ball B. the magnetic force pulling paper clips to a powerful electromagnet C. the magnetic force pushing two magnets apart D. the force of gravity acting on raindrops that fall to Earth

A. frictional forces slowing down a rolling soccer ball

300

Sound is caused by vibrations. What changes about the sound when the speed of the vibration changes?

PITCH Changing the speed of the vibration changes the pitch of the sound. For example, a long harp string that is vibrating slowly has a low pitch. A short string that is vibrating fast has a high pitch.