| A | B |
|---|
| A coral reef is an example of a(n) | ecosystem |
| All humans belong to the same | species |
| Tomato juice is considered a(n) | acid |
| Measuring the strenths of acids and bases is done on the | pH scale |
| All of the students in your school represent a(n) | populations |
| A solution with a pH of 9 is a(n) | base |
| Water molescules are (blank) because they carry both negative and positve charges | polar |
| Water is the universal | solvent |
| Clown fish, sea anemones, and coral form a(n) (blank) on a reef | community |
| Sugar is the (blank) when it is dissolved in coffee | solute |
| The interactions of the pictured organisms with the soil, sunlight, temperature, and water make this meadow an example of a(n) | ecosystem |
| All the dandelions living in this meadow make up a(n) (blank) of dandelions | population |
| When you make a powedered drink mix, you measure the mix into a glass, add water and stir. What materials represent the solution, solute, and solvent in your glass. | The solution is the drink; the solute is the powdered mix, and the solvent is the water. |
| What do tropical rain forests and coral reefs have in common? | Both are examples of ecosystems that have high species diversity. |
| Would you expect polar bears to have a thick layer of fat under their fur? Why? | Yes. Polar bears are adapted to the cold of the Arctic and other such animals have thick layers of fat. |
| Explain why salt dissolves in water. Idenitfy the solute and the solvent in your answer. | Water (the solvent) is a polar molecule. The positive end of water attracts the negative chloride ion of salt (the solute), while the negative endo f water attracts the positive sodium ion of salt. |
| What are a few examples of a biotic factor? | animals, bacteria, mushrooms |
| What are a few examples of abiotic factors? | acid rain, humidity, floods |
| A lake's water has a pH of five. This means that in the water there are... | more hydrogen ions than hydroxide ions. |
| All of the goldfish in an aquarium rank represent a(n) | population |
