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Choose the best answer for the following questions.
Grasshoppers are eating a farmer's crop. According to the food web, what might happen if the grass in the field was sprayed to kill the grasshoppers?
There would be more food for frogs.
There would be more snakes.
There would be fewer crops.
There would be less food for hawks.
The table above shows whether or not each mineral can scratch the other minerals. Based on the table, which mineral is the hardest?
Can't be educed by the table.
When you pull the wagon forward suddenly, what will happen to the ball?
The ball will hit the front wall.
The ball will hit the back wall.
The ball will fly up in the air.
The ball will stay where it is.
In an ecosystem, which group of organisms puts a large amount of oxygen into the air?
The diagram above shows a plastic cup floating in a container of water. If some marbles are placed in the cup, what will happen to the water level?
remain the same
none of them
The students in Mr. Taylor's class are studying how frog eggs hatch. Each student writes notes about what he or she is observing. Which set of notes gives the MOST SCIENTIFIC description of a student's observations?
"The eggs look soft and have clear gel all over them. They hatch into tadpoles."
"The eggs are in our classroom aquarium. They are in a clump. There are a lot of eggs that will become tadpoles."
"Twenty-one large eggs are together in a jelly-like mass. Each egg has a dark spot where the tadpole is growing."
"The eggs are from a pond near our school. They have been in here a few days. Tadpoles hatch out of the eggs."
Which object, by itself, produces a large amount of BOTH heat and light energy?
When the ingredients for a chocolate cake are being mixed, the cake batter is like a thick, brown soup. Which physical property of the cake is the SAME after the cake is baked?
Why are rocks important in an ecosystem?
Because they provide shelter for some organisms.
Because they help to break down dead and decaying matter.
Because they serve as a food source for many types of animals.
Because they give off oxygen for animals to breathe.
Which is the most important thing that both scientists and inventors do?
Both work alone in a laboratory.
Both keep the results of their work a secret.
Both get patents on their successful products.
Both use their knowledge to solve problems.
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