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OAA Test Practice
Test Description: OAA test practice
Instructions: Answer all questions to get your test result.
1) A student wraps a wire around an iron nail then connects the wire to a battery. The nail attracts other nails and stick together. What force holds the two nails together?
A
gravitational force
B
electric force
C
magnetic force
D
friction force
2) What motion causes the pattern of day and night?
A
the moon orbits around the Earth.
B
the moon rotates on its axis
C
Earth rotating on its axis
D
Earth orbits around the sun.
3) Water is inside a popcorn kernel. When temperature increases the kernel explodes. What change in state of the water takes place inside the kernel causing the volume to increase?
A
solid to gas
B
liquid to solid
C
solid to liquid
D
liquid to gas
4) From which part of the plant does a bee get food?
A
stem
B
flower
C
seed
D
root
5) What is the role of decomposers in a food web?
A
Decomposers are a food source for plants
B
Decomposers use sunlight to make food.
C
Decomposers only eat plants that grow underground.
D
Decomposers break down dead plants and animals
6) What would cause bicycle tires to feel warm on a cold day, after riding to the store?
A
the wind blowing against the bike
B
the rubbing between the ground and the tire.
C
the air escaping from the spinning tires
D
the heat transferring from the rider's hands to the tire
7) Earthworms live underground and dig tunnels. This helps improve the soil so plants grow better. Which statement explains how earthworms tunnels help plants?
A
Earthworms tunnels loosens the soil so plant roots can easily grow.
B
Earthworm tunnels allow sunlight to reach the plant roots in the soil
C
Earthworms tunnels bring heat into the soil that warms plants roots
D
Earthworm tunnels create places where insects can hide and protect the plant's roots.
8) Students build a circuit with a buzzer and switch. the students close the switch, but the buzzer doesn't buzz. What could be the reason?
A
The buzzer is in the wrong place in the circuit.
B
the switch is closed
C
the wires connect to the battery from the negative to the positive ends of the battery
D
the wires are not touching conductors
9) What is the function of the sunflower's seeds?
A
production of sunflower petals
B
reporduction of the sunflower
C
food for the bee
D
food for the sunflower
10) What causes a blue block to appear blue in the sunlight?
A
The block absorbs all blue light
B
Only blue light is reflected by the block
C
The block bends (refracts) all blue light.
*select an answer for all questions
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