Plants get the materials they need for growth chiefly from these two things.
What is sun and water?
If you go far enough down the food chain, food of almost any kind of animal can be traced back to _____.
What is plants (producers)?
Action AA batteries last four times as long as Bonus AA batteries. Action AA batteries also cost four times as much as Bonus batteries. What is a good reason to buy Action AA batteries?
What is they last longer and generate less waste over a longer period of time?
When an experiment is repeated and the new results are different from the original results, what could you assume to be true?
What is something changed; neither test results are 100% reliable and additional experimentation is needed?
If several governments decided to agree to limit the amount of fish harvested from an ocean, why might they do this? What is the point of this?
What is conserving a natural resource (keeping the population at a healthy level)?
Ms. Jovin's class is investigating simple machines. They built a ramp to roll tennis balls down, and measured how far they rolled. The tennis balls released at the top of the ramp all traveled about the same distance. If they wanted the balls to roll even further, they could do this.
What is build a ramp that is taller/steeper?
A big rock is weathered over many years by a river, until only small pebbles remain. The mass of all the pebbles is less than the mass of the rock. The rest of the rock PROBABLY did this.
What is converted into soil/eroded?