Answer:
UP
Explanation:
heat rises. That powers convection which is in the link
200n because it's 2×5=10so maybe try solving the problem like that ok does that help
Answer:
B.
Explanation:
The water collects in the ocean; it is then evaporated by the sun. After evaporation the water turns into water vapor, it then condenses to form clouds.
First of all, an alpha particle consists of two protons and two neutrons (similar to a Helium atom). When an atom emits an alpha particle, its nucleus loses two protons and two neutrons. And its total mass decreases by 4 atomic mass units.(As mass of a proton or a neutron is 1 amu)
There are two kinds of beta emissions (or particles) positron or electron.
When an atom emits a

(positron) particle, actually one if its protons releases the particle. Since a positron's charge is positive, when the atom releases a positron it loses its positive charge and turns into a neutron.
When an atom emits a

(electron) particle, one of its neutrons releases a

(electron). And since an electron's charge is negative (-) the neutron loses its negative charge (since neutron's electrical charge is neutral) and turns into a proton.
This is simply explained ^
There are some other details but this should be enough :)