Science test改正 Help me!Please~

Here's your pass to 合格呀!!

1)Which of the following cannot be explained by the kinetic molecular theory?

d)solid water(ice)floats in liquid water
Ice floats because it's less dense than liquid water so not related to kinetic molecular theory.

2)Mass is measured in

d)all of the above
All of those units can be used to measure mass

3)The upward force that a fluid exerts on an object less dense than itself is called

b)buoyancy
That's the meaning of buoyancy.

4)The meniscus is:

a)the slight curve you see when reading from a graduated cylinder
The curve you see on the top liquid level is the meniscus and measurement is based on that line at the bottom of the curve

5)Water will climb up a paper towel because of:

b)adhesion
Adhesion is water attaching to surfaces. Cohesion is when water clinging onto each other to form surface tension.

6)Ifyou took a tray of ice out of freezer, describe, in scientific term,what has happened to the ice when you come back to use it and only theempty container remain.

Due to the warm temperature, the ice condenses into water. The water then evaporates into the air when given enough time.

7)You need a stick of butter to makesome cookies. You have a stick on the fridge but there is also one outon the counter. Unfortunately, it's been sitting in a sunny spot and ithas melted.
a)describe why it has melted.

The sun's heat energy supplied to butter overcomes the forces bonding the butter in a solid state are overcome, so the butter melts when those bonds are broken.

b)which stick has a higher density - the one from the fridge or the one on the counter. why?

The one from the fridge is denser because the butter in the solid form is highly packed due to their bonding with each other. After melting, the butter will expand in volume and causing the density to lower.