Please help and thank you!
This is more Environmental science than biology.

1. B

2. C

3. E

4. A

5. D

Explanation:

1.  The dependent variable is that part of an experiment that is measured when collecting data.

2. Observation involves taking notice of things with your senses.

3. The control of an experiment is the variable that is normal or remained unchanged.

4. A hypothesis is a testable prediction.

5. The independent variable is the variable that is changed.

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.