Hypothesis: If plants are placed in white light, then the will grow better than plants in other colours of light.
Independent variable: Colour of light.
Dependent variable: plant growth.
Control group: the plant in the closet.
Experimental group: the plant is the other light colours.
Constants: miracle grow and amount of water.
Measurements: height of plants.
4.6 million years ago the earth had less green house gasses so the atmosphere was cooler rather than hotter.
Answer: D
Explanation: it’s the size of the sediments
