GRADE 7 NATURAL SCIENCE EXAM
QUESTIONS AND CORRECT ANSWERS
Name the 5 main Kingdoms in the Biosphere. - ANSWER-1. Monera
2. Protista
3. Fungi
4. Plantae
5. Animalia
Name 2 examples that would you can separate using the hand sorting method? -
ANSWER-jelly beans and Liquorice All Sorts
Name an example of an arthropod. - ANSWER-spiders
If you wanted to separate rice from flour, what method would be best? - ANSWER-
sieving
Name the 2 major groups of Angiosperms. - ANSWER-Monocotyledons and
Dicotyledons
What is the scientific name for vinegar? ____________ acid. - ANSWER-Ethanoic
TRUE or FALSE
A flower has both male and female structures. - ANSWER-true
Vinegar is an example of? - ANSWER-an acid
Soap is an example of? - ANSWER-a base
________ is the transfer of pollen between plants of the same species, for fertilization
purposes. - ANSWER-pollination
What acid is found in milk? ___________ acid. - ANSWER-Lactic
TRUE or FALSE
Taste is the best way to distinguish between acids and bases. - ANSWER-false
TRUE or FALSE
Puberty begins between 7-13 years. - ANSWER-true
(Base/Acid) has a pH greater than 7. - ANSWER-base
(Base/Acid) has a pH less than 7. - ANSWER-acid
, Boys experience a growth spurt at around (16/13) years of age. - ANSWER-13
Toothpaste is a (acid/base). - ANSWER-base
TRUE or FALSE
A weak base ionizes fully in an aqueous solution. - ANSWER-false
What does STDs stand for? - ANSWER-sexually transmitted diseases
What is a very good conduct of electricity and it can be shaped into wires? - ANSWER-
copper
Bees, water, wind and animals can pollinate flowers and plants. They are called ... -
ANSWER-pollinators
Materials that are (durable/flexible) can bend easily without breaking or being damaged.
- ANSWER-flexible
What does the term boiling point mean? - ANSWER-The temperature at which a liquid
boils and turns into a gas.
At what temperature do you think orange juice and milk will boil?_________°C -
ANSWER-100
A (impure/pure) substance has uniform composition and consists of particles of only
one kind - ANSWER-pure
What is a solution? - ANSWER-It is a mixture which means that 2 substances are mixed
together.
If you wanted to separate pebbles, paper clips and gemstones, what separation
methods would you use? - ANSWER-Hand sorting
The _________ is a classification system that categories all elements that make up
matter and materials in the world. - ANSWER-periodic table
What is the method used when the grains of one substance are larger than the other? -
ANSWER-Sieving
The best method to separate a mixture of sand and iron nails is _______. - ANSWER-
magnetic separation/magnetism
Give the name for the symbol C on the Periodic Table. - ANSWER-carbon
All of life on Earth exists in an area known as the _______. - ANSWER-biosphere
QUESTIONS AND CORRECT ANSWERS
Name the 5 main Kingdoms in the Biosphere. - ANSWER-1. Monera
2. Protista
3. Fungi
4. Plantae
5. Animalia
Name 2 examples that would you can separate using the hand sorting method? -
ANSWER-jelly beans and Liquorice All Sorts
Name an example of an arthropod. - ANSWER-spiders
If you wanted to separate rice from flour, what method would be best? - ANSWER-
sieving
Name the 2 major groups of Angiosperms. - ANSWER-Monocotyledons and
Dicotyledons
What is the scientific name for vinegar? ____________ acid. - ANSWER-Ethanoic
TRUE or FALSE
A flower has both male and female structures. - ANSWER-true
Vinegar is an example of? - ANSWER-an acid
Soap is an example of? - ANSWER-a base
________ is the transfer of pollen between plants of the same species, for fertilization
purposes. - ANSWER-pollination
What acid is found in milk? ___________ acid. - ANSWER-Lactic
TRUE or FALSE
Taste is the best way to distinguish between acids and bases. - ANSWER-false
TRUE or FALSE
Puberty begins between 7-13 years. - ANSWER-true
(Base/Acid) has a pH greater than 7. - ANSWER-base
(Base/Acid) has a pH less than 7. - ANSWER-acid
, Boys experience a growth spurt at around (16/13) years of age. - ANSWER-13
Toothpaste is a (acid/base). - ANSWER-base
TRUE or FALSE
A weak base ionizes fully in an aqueous solution. - ANSWER-false
What does STDs stand for? - ANSWER-sexually transmitted diseases
What is a very good conduct of electricity and it can be shaped into wires? - ANSWER-
copper
Bees, water, wind and animals can pollinate flowers and plants. They are called ... -
ANSWER-pollinators
Materials that are (durable/flexible) can bend easily without breaking or being damaged.
- ANSWER-flexible
What does the term boiling point mean? - ANSWER-The temperature at which a liquid
boils and turns into a gas.
At what temperature do you think orange juice and milk will boil?_________°C -
ANSWER-100
A (impure/pure) substance has uniform composition and consists of particles of only
one kind - ANSWER-pure
What is a solution? - ANSWER-It is a mixture which means that 2 substances are mixed
together.
If you wanted to separate pebbles, paper clips and gemstones, what separation
methods would you use? - ANSWER-Hand sorting
The _________ is a classification system that categories all elements that make up
matter and materials in the world. - ANSWER-periodic table
What is the method used when the grains of one substance are larger than the other? -
ANSWER-Sieving
The best method to separate a mixture of sand and iron nails is _______. - ANSWER-
magnetic separation/magnetism
Give the name for the symbol C on the Periodic Table. - ANSWER-carbon
All of life on Earth exists in an area known as the _______. - ANSWER-biosphere
