Grade 10 Science Exam

1.

2 points

The correct name for the compound P(4))(10) is

phosphorus (IV) decaoxide

tetraphosphorus decaoxide

phosphorus oxide

diphosphorus pentaoxide

2.

2 points

What type of chemical reaction will produce at least one solid ionic product from the reaction of two aqueous ionic solutions?

single replacement

sythesis

double replacement

Combustion

3.

1 point

Which of the following is not a medical imaging technology?

MRI

CT

X-ray

STS

4.

1 point

The genetic code uses the four types of building-block molecules in a specific combination. What is the correct combination?

A-C, T-C

A-T, C-G

A-D, C-T

5.

2 points

Which of the following tools do scientists use to predict future climate change?

weather satelites

radar

ice corees

general circulation models

6.

2 points

Which of the following activities will reduce your carbon footprint?

eating large amount of meat and dairy products

using single-use plastic shopping bags

leaving appliances plugged in when not in use

using compact fluorescent light bulbs

7.

2 points

What type of chemical reaction will produce a single product fom two or more reactants?

combustion

double replacement

decomposition

synthesis

8.

1 point

Spindle fibres first start to form during

anaphase

telophase

prophase

metaphase

9.

2 points

Which of the following biomes is found in Ontario?

permanent ice

temperate rainforest

boreal forest

desert

10.

2 points

which of the following is the correct name for Ti(SO4)2?

titanium sulfate

titanium (IV) sulfat

titanium sulfite

titanium(III) sulfite

11.

1 point

The four types of building-block molecules of DNA of the genetic code (adenine, thymine, cytosine, and guanine) stay the same before and after mitosis.

True

False

12.

1 point

The refractive index cannot be smaller than 1.

True

False

13.

1 point

Xylem cells are the sites for most plant photosynthesis.

True

False

14.

1 point

Mutations are a result of

mitosis

mutagens

cold temperatures

combining DNA from cows and fish

15.

2 points

In which of the following mirrors can you always expect an image that is virtual and the same size as the object?

concave

spherical

plane

convex

16.

1 point

The top layer of a leaf is called the phloem.

True

False

17.

1 point

Light is bent towards the normal when it passes from air to glass.

True

False

18.

1 point

Glass has a greater refractive index than air.

True

False

19.

2 points

Which of the following optical effects is NOT an effect of refraction?

sun dogs

fluorescence

shimmering

mirage

20.

1 point

DNA is a large molecule. This molecule has specific sites that are called

proteins

helixes

genes

codes

21.

2 points

Which of the following diseases associated with vision is not the direct result of a change in the shape of the eye lens?

near-sightedness

cataracts

far-sightedness

presbyopia

22.

2 points

Which greenhouse gas has the highest global warming potential?

carbon dioxide

methane

chlorofluorocarbons (CFCs)

nitrous oxide

23.

1 point

When light is incident on a surface along the normal, only refraction occurs; there is no reflection.

True

False

24.

1 point

List the three types of muscle tissue

cardiac

muscular

smooth

rough

25.

1 point

The layers of a leaf from top to bottom are

epidermis, guard cells, mesophyll, palisade

epidermis, palisade, mesophyll, guard cells

mesophyll, palisade, guard cels, epidermis

mesophyll, guard cells, palisade, epidermis

26.

1 point

The most muscular pump in the hear is the

right artium

left ventricle

right ventricle

left artium

27.

1 point

If the speed of light in raindrop is equal to that in air, there would be no rainbows.

True

False

28.

1 point

Lateral buds are controlled by

the type of root

The amount of sap avaliable

the chemical auxin

the thickness of the cuticle

29.

1 point

A cell spends most of the cell cycle going through mitosis.

True

False

30.

2 points

A student records the pH of solution A as 3 and the pH of solution B as 9. Which of the following conclusion is supported by these measurements?

The H(+) ion concentration in solution B is three times higher than in solution A.

The H(+) ion concentration in solution A is one million times higher than in solution B.

The H(+) ion concentration in solution B is one million times higher than in solution A.

The H(+) ion concentration in solution A is three times higher than in solution B.

31.

2 points

A cell with 10 chromosomes undergoes mitosis and cell division. How many daughter cells are produced and what number of chromosomes are in each cell?

2 daughter cells, 10 chromosomes in each cell

5 daughter cells, 2 chromosomes in each cell

1 daughter cell, 10 chromosomes in each cell

32.

1 point

Mesophyll tissue helps the plant by

collecting sunlight to make sugar by photsynthesis

holding the water and carbon dioxide needed for photosyntheseis

producing the green colour that is seen in leaves

carrying the sugar away to other parts of the plant

33.

0 points

Light slows down when it enters a material from air.

True

False

34.

1 point

Meristem cells become specialized plant cells.

True

False

35.

1 point

Jellyfish are able to emit light in a process known as fluorescence.

True

False

36.

1 point

Radar antennae act as concave mirrors for radio waves.

True

False

37.

1 point

If light travels at the same speed in all materials, refraction would still occur when it passes from air to water.

True

False

38.

2 points

Which of the following factors affects Earth's climate by changing the albedo of the planet?

the acidity of the oceans

the tilt of Earth's axis

the size of the polar icecaps

the amount of energy emitted by the Sun

39.

1 point

Maple sap moves up the tree in the fall to get the tree ready for winter.

True

False

40.

1 point

Which parts connect the roots of a plant to the shoots

meristem and cambium

chloroplasts and ground tissue

stamens and pollen

xylem and phloem

41.

1 point

All tumour cells are cancer cells.

True

False

42.

2 points

When the following chemical equation is balanced, what is the value of x?
xCr + yO2 -> zCr(2)O3

4

1

3

2

43.

1 point

Cytokinesis and Mitosis are two major steps in

44.

1 point

In which of the following organelles would you expect to find DNA?

Vacuole

Golgi Apparatus

Endoplasmic Reticulum

Nucleus

45.

1 point

The major difference between Newton's design for the telescopes and the designs of his predecessors was the presence of a(n)

eyepiece lens

plane mirror

objective lense

concave mirror

46.

2 points

Which source produces light as a result of the heating of atoms?

fluorescence

bioluminescence

chemiluminescence

incandescence

47.

1 point

Stem cells are found only in embryos.

True

False