4 questions in science! 10 points!?

Question

1: What is a possible reason that iron is a solid while H2O is a liquid at room temperature?

a.Iron atoms are heavier than water molecules and thus require more energy to go to the liquid state

b.Iron atoms are harder than water molecules

c.Adding water to iron changes it to the rust state of matter

2: When is condensation seen outside?

a.When moist air condenses into rain

b.Condensation can only occur inside

c.When water becomes a solid

3: Why isn't a mercury thermometer good to use near the North Pole?

a.Mercury is too magnetic to use near the North Pole

b.Mercury is too expensive to use in a thermometer

c.The mercury may freeze at very cold temperatures near the North Pole

4: Why does water boil at a lower temperature on a mountain top?

a.It is hotter when you are closer to the Sun

b.There is less pressure to contain the water molecules

c.You can't boil water on a mountain top

Answer 1

1)a

2)a

3)c

4)b