Grade 7 science: Solutions Question
and answers 100% correct
Explain the difference in appearance between a pure substance and a mixture
- correct answer ✔A mixture you will be able to see both subs. as oppose to
a pure sub. which is just one object/element made of matter.
What are the key differences between solutions and mechanical mixtures? -
correct answer ✔That in solutions it's a homogeneous mix. but with
mechanical mix. it's heterogeneous.
Explain why most foods and beverages are mixtures. Use examples. - correct
answer ✔Because they're often mixed with another ingredient. Whether that's
sugar, sweetener, ice/water etc.
Explain whether you would classify each of the following as a pure substance
or a mixture.
Apple juice, fruit punch, distilled water, lemonade. - correct answer ✔Pure
sub: Apple juice, fruit punch and lemonade. Mixture: Distilled water. Because
the first three have some kind of sugar or sweetener, as opposed to the water,
that's filtered and clean.
Describe what happens to the particles of a solid as it changes state to
become a liquid. - correct answer ✔
I am able to list the 6 statements of the particle theory of matter and can apply
them to explain different concepts, for example, why heat is required to boil
water. - correct answer ✔1. All matter is made up of particles.
2. All particles of one sub. are identical.
3. The particles of matter are in constant motion.
and answers 100% correct
Explain the difference in appearance between a pure substance and a mixture
- correct answer ✔A mixture you will be able to see both subs. as oppose to
a pure sub. which is just one object/element made of matter.
What are the key differences between solutions and mechanical mixtures? -
correct answer ✔That in solutions it's a homogeneous mix. but with
mechanical mix. it's heterogeneous.
Explain why most foods and beverages are mixtures. Use examples. - correct
answer ✔Because they're often mixed with another ingredient. Whether that's
sugar, sweetener, ice/water etc.
Explain whether you would classify each of the following as a pure substance
or a mixture.
Apple juice, fruit punch, distilled water, lemonade. - correct answer ✔Pure
sub: Apple juice, fruit punch and lemonade. Mixture: Distilled water. Because
the first three have some kind of sugar or sweetener, as opposed to the water,
that's filtered and clean.
Describe what happens to the particles of a solid as it changes state to
become a liquid. - correct answer ✔
I am able to list the 6 statements of the particle theory of matter and can apply
them to explain different concepts, for example, why heat is required to boil
water. - correct answer ✔1. All matter is made up of particles.
2. All particles of one sub. are identical.
3. The particles of matter are in constant motion.
