physical and chemical changes

Question 1

physical changes (2)

Answer 1

• reversible

- no new substance formed

Question 2

chemical changes (3)

Answer 2

• not reversible
• forms 1 or more new substance
• can cause change in temperature

Question 3

atoms (1)

Answer 3

-smallest part/particle of an element

Question 4

molecule (2)

Answer 4

• two or more chemically bonded atoms

- atoms can be same element or not

Question 5

compound (1)

Answer 5

-two or more different elements chemically bonded together

Question 6

mixture (3)

Answer 6

• two or more different elements physically bonded together
• each substance will keep their individual properties
• can be speared physically