Force | Simple Machines | Ecology 1 | Ecology 2 | Wild Cards |
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D) a 400 gram ball
Which ball was thrown with the greatest force? A) a 100 gram ball B) a 200 gram ball C) a 300 gram ball D) a 400 gram ball
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D) screw and inclined plane
What two simple machines are MOST alike? A) screw and lever B) lever and wedge C) pulley and wheel-and-axle D) screw and inclined plane
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C) they break down the remains of other organisms and add nutrients to the soil
Decomposers are helpful in a food chain because...A) the produce food from sunlight, water, and carbon dioxide B) they eat other animals, keeping the population of consumers down C) they break down the remains of other organisms and add nutrients to the s
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C) Producer
What is missing from this food chain: Shark-Fish-
A) predator B) Herbivore C) producer D) consumer |
D) fish and frog
According to the food web, what are two sources of energy for the bird? A) snail and grasshopper B) plant and fish C) rat and frog D) fish and frog
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A) fly off into space
If Earth's gravity did not act on the moon, the moon would...A) fly off into space B) crash into Earth C) orbit faster D) weigh more than it does
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A) wedge
Which of the following would be the BEST simple machine to use to slice celery? A) wedge B) pulley C) screw D) inclined plane
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A) the number of producers in the habitat gets too low
What happens to a population if there are too many first-level (Primary) consumers in a habitat? A) the number of producers in the habitat gets too low B) there is not enough for the second- level consumers to eat C) it causes a change in the climate D) N
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D) shrub
Which organism is responsible for changing the suns energy into food energy? A) a beaver B) Frog C) river D) shrub
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D) lawn mower
Which of these is NOT a simple machine? A) Broom B)broom C) rake D) lawn mower
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C) It accelerated
A car is moving at a speed of 60 kilometers per hour. Its speed the increases to 70 kilometers per hour. What must be true of the car? A) Its direction of travel changed B) Its mass increased C) It accelerated D) its velocity decreased
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Lever
What simple machine has a Fulcrum?
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C) all the trout living in a lake
Which of the following describes a population? A) a family living in a house together B) a blue jay living alone in a tree C) all the trout living in a lake D) all the plants and animals in a forest
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D) wildflower-rabbit-coyote
Carlos observed rabbits, wildflowers, and a coyote. which sequence correctly shows the transfer of energy among these things? A) coyote-wildflower-rabbit B) coyote-rabbit-wildflowers C) wildflowers-coyote-rabbit D) wildflower-rabbit-coyote
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D) the Objects inertia does not change
During which portion of its movement does the object have greater inertia? A) before it changes direction B) after it changes direction C) at the moment it changes direction D) The objects inertia does not change
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D) the box moves faster
Jarod is pushing a box across the floor. Ashleigh decides to help him. What is the result? A) The mass of the box decreases B) Friction is educed by half C) the box has less inertia D) the box moves faster
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C) lever and wedge
Which kinds of simple machines make up scissors? A) wheel-and-axle and pulley B) pulley and inclined plane C) lever and wedge D) wedge and inclined plane
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D) both are consumers
What do a chipmunk and a horse have in common? A) both are predators B) both are prey C) both are decomposers D) both are consumers
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A) number of light
If you build a really large fence. which abiotic factor is different after the fence is built? A) amount of light B) amount of water C) number of animals D) number of plants
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A) its mass
A truck has more inertia than a bike. Which characteristic of the truck accounts for this? A) its mass B) its volume C) its shape D) its age
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D) speed
A car is traveling at a speed of 100 kilometers per hour. Suddenly, it starts going faster. What caused the increase in speed? A) velocity B) a force C) inertia D) speed
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C) screw and wedge
What two simple machines are inclined planes? A) pulley and wheel-and-axle B) lever and pulley C) screw and wedge D) screw and wheel-and-axle
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A) Dead plant and animal matter would break down more slowly
What would happen if the number of decomposers in an ecosystem was reduced? A) dead plants and animal matter would break down more slowly B) Temperatures would rise, causing dry weather C) Other organisms would move away to find new sources of food D) Rai
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C) the amount of energy available to living things decreases
Picture an energy pyramid. why does the number of living things decrease as you move toward the top? A) the amount of sunlight decreases B) there is not enough air in the environment for a large number of living things C) The amount of energy available to
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D) a force acting on it
An object is moving at a constant speed. The object changes direction and continues moving at the same speed. What caused the object to change direction? A) Momentum B) a change in speed C) inertia and gravity D) a force acting on it
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