1. Chemistry is important mainly because all matters, including our body, is made of chemicals. Basically, chemistry is a way of learning how everything works, and what’s it composed of.
2. Alfred Nobel is best known for inventing dynamite which is a stabilized form of nictoglycerin. He also invented the blasting cap, which is used to trigger explosives. Additionally, he founded Nobel Prizes.
4. (a) air - mixture and homogeneous
(b) chocolate and almond - mixture and heterogeneous
Answers & Comments
1. Chemistry is important mainly because all matters, including our body, is made of chemicals. Basically, chemistry is a way of learning how everything works, and what’s it composed of.
2. Alfred Nobel is best known for inventing dynamite which is a stabilized form of nictoglycerin. He also invented the blasting cap, which is used to trigger explosives. Additionally, he founded Nobel Prizes.
4. (a) air - mixture and homogeneous
(b) chocolate and almond - mixture and heterogeneous
(c) aluminum - pure substance and homo
(d) iodine tincture - mixture and homo
6. a. physical
b. chemical
c. chemical
d. chemical
e. chemical