Answer: Diffusion across a membrane!
Explanation:
Water can easily go through the semi-permeable membrane by osmosis!
Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together.
Answer:
Angle of light source
Explanation:
Independent variable is the variable that the experimenter changes or manipulates in an experiment in order to bring about a measurable response, which is the dependent variable.
In this question, a student wants to investigate the effects of phototropism in bean plants. She places a light source directly above one plant, at a forty-five degree angle to another, and at a ninety-degree angle from the third. This shows that the variable being manipulated (independent variable) is the ANGLE OF THE LIGHT SOURCE.
eel- electrical energy
bat- mechanical energy
polar bear- thermal energy
firefly- radiant energy
Biotic: Trees. Mosses. Fungi. Mammals. Birds. Reptiles. Insects. Worms.
Abiotic: Rocks. Water. Sunlight. Soil. Minerals. Temperature.
