No student devices needed. Know more
20 questions
Which food chain is in the correct order?
grasshopper → grass → snake → frog → hawk
grasshopper → frog → hawk → snake → grass
grass → grasshopper → frog → snake → hawk
grass → grasshopper → snake → frog → hawk
How have desert plants adapted to their environment?
by limiting the use of sunlight
by storing water
by distributing certain nutrients
by releasing water
This diagram represents a food web. What role is the owl in the food web?
consumer
decomposer
herbivore
producer
Why can frogs and snakes live in the same garden?
Both keep weeds out of the garden.
Both help different plants to grow
Both occupy different niches.
Both compete for water.
What prevents plant growth beneath the trees in thick forests?
The trees limit the amount of sunlight that is able to reach the ground.
The roots of the trees make it difficult for plants to grow.
Little water reaches the ground under the trees.
The temperature of the soil under the trees does not allow plants to grow.
Which is the best example of habitat reduction caused by humans?
Birds and animals flee a forest fire caused by lightning
Birds become sick from eating insects new to their area.
Fish swimming to breeding grounds are blocked by dams.
A new species of fish migrates up a river, competing with native fish for food.
How is a delta most likely formed?
irrigation
glacier movement
precipitation and condensation
deposition of sediment
Which human activity will most likely increase the amount of soil erosion?
growing crops
mowing grass
planting flowers
clear-cutting wooded areas
All of the landforms on Earth are constantly changing shape. What is most responsible for the changes in the landforms?
earthquakes
water erosion
pollution
oceans
How does water help to break apart rock?
by freezing and expanding
by melting and contracting
by condensing and expanding
by evaporating and contracting
Which statement best describes runoff?
Water vapor cools off and changes into water droplets.
Water in the form of rain, snow, sleet or hail falls from clouds.
Precipitation that falls to Earth eventually flows over land into lakes, streams and rivers.
Water from the oceans and the surface of the earth changes into water vapor.
Much of the time the weather in Florida is affected by air masses moving from the Gulf of Mexico. Which best describes these air masses?
cold and moist
warm and moist
cold and dry
fun and festive
What do meterologist depend on to forcast an approaching storm?
air pressure
temperature
humidity
wind speed
This diagram shows a light bulb. The bottom of the light bulb is shaped so that the bulb fits securely into a light socket.
Which type of simple machine is the bottom of the bulb?
lever
pulley
screw
wedge
Two people are each pulling on the opposite ends of a rope. If they are pulling on the rope with equal but opposite forces, what will happen to the rope?
It will stay in place between the two people.
It will move toward the right.
It will move toward the left.
It will fall to the ground.
Which of the following statements best describes the climate of an area rather than its weather conditions?
The summers are hot and humid.
The temperature at noon was 86°F.
Total rainfall on April 9 was 2 inches
Strong winds are expected tomorrow evening
This graph shows the motion of an animal.
When does the animal remain still?
between second 1 and second 2
between second 2 and second 3
between second 3 and second 4
between second 4 and second 5
Which statement best describes what must happen in order for a person to lift an object?
The force of gravity must be greater than the mass of the object
The mass of the object must be greater than the force of gravity.
The force of gravity must be greater than the upward pull or push on the object.
The upward pull or push on the object must be greater than the force of gravity.
This diagram shows a ramp with a toy car at the bottom. A string is attached to the front of the car and the string goes over a pulley at the top of the ramp. A weight is attached to the other end of the string. What would be most responsible for the toy car being pulled up the ramp?
friction
gravity
kinetic energy
momentum
What increases as a rock falls to the ground?
the density of the rock
the pull of gravity on the rock
the inertia of the rock
the momentum of the rock
Explore all questions with a free account