Identify the process being described by each sentence. Condensation freezing melting evaporation sublimation

1. is the change of a solid into a liquid when heat energy is added.
2. A change from a liquid to a solid by removing heat energy is called .
3. Cooling of gas to form liquid is called .
4.The process of changing for a liquid to a gas when heat is added is
5. A change from a solid to a gas is called

What is the density of the black hole

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size