Answer:
it is w
Explanation:
i have done a similar question
Power is the rate at which work is done.
Hope this helps!
Answer:
w and x
Explanation:
they both rise and fall in the same places but they are different heights
B oxygen because they need it to survive
Answer:
chemical change.
Explanation:
There are two types of changes in matter: physical change and chemical change.
physical change- it is a change in matter that alters only its physical properties or its physical appearance. This type of change is reversible. For example- freezing of water, the water turns into solid ice and it can be reversed by melting the ice.
chemical change- it is a change in matter that alter its chemical and thus its physical properties. Most chemical changes are irreversible. for example- burning of paper, results in black soot and ashes- Thus changing both physical and chemical properties.
