An isolated system doesn't exchange energy or matter with the exterior. One example of isolated system is:

When you push really hard a balloon, it explodes. This is an example of:

When a kid plays with his toy cars, he pushes them to have a car race. This is an example of:

During the last few days the temperature has been really high. Rose sometimes has problems opening her front door in the morning, but at night everything is OK. This is an example of:

Thousand of years ago, our ancestors made tools out of rocks and wood. It means they were using the energy from:

Imagine you want to participate in a race. Your mom gives you a delicious chicken sandwich and some oatmeal two hours before the race and wish you the best. What kind of energy is used by your body?

Nowadays, many people install solar panels at home to get another source of energy for their devices. What kind of energy is used in this example?

Sometimes, people like listening to music at very high levels. This can cause damage to the organs involved with hearing but that doesn't seem to matter when they are partying. What kind of energy is used in this example?

Our planet is the only one in our solar system that keeps liquid water. In The Earth, it can be found in solid state in places like Antartica and as water vapor in our atmosphere. What kind of energy allows this changes of state?