2022 Grade 8 Intermediate-Level Science Test Questions 1-10 Question Preview (ID: 59881)

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All living things are composed of

a) vitamins

b) blood

c) cells

d) organs

Which process is carried out by both a plant and an animal?

a) eating food

b) growing in size

c) taking in carbon dioxide

d) making oxygen

Which level of classification contains organisms that are the most closely related?

a) Family

b) Genus

c) Kingdom

d) Species

When a person chews food, the teeth grind the food into smaller pieces. This is an example of

a) mechanical digestion

b) chemical change

c) cellular respiration

d) waste removal

What is the function of this system?

a) breakdown of food

b) production of sex cells

c) removal of dissolved wastes

d) coordination of body movement

The guinea pigs in a certain population all have black fur. The sudden appearance of a guinea pig with white fur in this population may be the result of

a) ozone depletion

b) asexual reproduction

c) gene mutation

d) habitat destruction

As their environment slowly changes, organisms with certain traits are more likely to survive and produce offspring with those same traits. This statement describes

a) cell division

b) genetic engineering

c) resource conservation

d) natural selection

The significant differences between these four dogs were caused by humans. These differences are best explained by the process of

a) biological adaptation

b) selective breeding

c) metamorphosis

d) regulation

Studying the beak of each of these birds would best help a scientist understand

a) how the birds fly

b) where the birds live

c) what the birds eat

d) if the birds migrate

Based on the graph, it might be concluded that

a) there were fewer extinctions 600 million years ago than at present

b) the greatest invertebrate extinction rate occurred about 450 million years ago

c) the most recent peak in extinction rate affected the largest number of groups

d) the five greatest invertebrate extinction rates occurred every 100 million years

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