Question

true or false

1. a hypothesis should always be written as an \if...then...\ statement.
2. the dependent variable is what you change in an experiment.
3. adhesion allows water to move up plant stems.
4. cohesion helps create surface tension.
5. ice is more dense than liquid water.
6. water is a nonpolar molecule.

Explanation:

1. A hypothesis can be written in other forms, not just "If...then..." statements.
2. The independent variable is what you change in an experiment, not the dependent variable.
3. Adhesion between water and plant - stem materials helps water move up plant stems.
4. Cohesion among water molecules creates surface tension.
5. Ice is less dense than liquid water, which is why ice floats.
6. Water is a polar molecule due to its uneven distribution of charge.

Answer:

1. False
2. False
3. True
4. True
5. False
6. False