Anna wants to see how tall her tomato plants will grow at different levels of humidity inside of her greenhouse. She places one tomato plant outside in normal conditions. The height of the tomato plants are measured once per week. What is the independent variable in this experiment?

EARTH SCIENCE

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	humidity levels
B	the plant left outside
C	how tall the tomato plants get
D	the greenhouse

Explanation:

Detailed explanation-1: -For the optimal development of the tomato plant, a relative humidity between 65% and 85% is required. Higher relative humidity levels negatively influence pollen release and distribution on the stigma.

Detailed explanation-2: -For tomatoes, the ideal humidity should be between 65 and 75% during the night and 80 to 90% during the day. Tomato yields and fruit quality are lower at lower VPDs (higher humidity).

Detailed explanation-3: -Tomatoes generally have two ways of growing: Cordon (or indeterminate) tomatoes grow tall, up to 1.8m (6ft), and require tall supports. They are great for growing in a greenhouse, but will also do well in a sunny spot outdoors, either in the ground or in large pots against a south-facing wall.

Detailed explanation-4: -The Hypothesis The tomato hypothesis: soda will grow the tallest tomato plants. This educated guess is about the relationship between the independent and dependent variables. The independent variable (the liquid) is intentionally manipulated or changed during the experiment.

There is 1 question to complete.