Grade 10 Maths and Science Quiz

What shape is represented by the diagram?

• Rhombus

• Pyramid

• Trapezium

• Parallelogram

Answer explanation

The correct answer is trapezium

Simplify 6 - (-3) + 9 -5

• 13

• 7

• -5

• 23

Answer explanation

6 - (-3) + 9 - 5

Note that - x - = +

6 + 3 + 9 - 5

9 + 9 - 5

18 - 5

13

What is the function of the ovaries?

• Hormone production

• Ovulation

• Store ovules

• All of the above

Answer explanation

Females are born with ovules (eggs) which are stored in the ovaries. The ovaries also produse the hormones oestrogen and progesterone which are responsible for the development of reproductive organs, ovulation and regulation of the menstrual cycle.

What is the perimeter of the above rectangle?

• 19cm

• 5cm

• 38cm

• 84cm

Answer explanation

Perimeter of a plane shape is the sum of the measurements of all its boundaries.

A rectangle has 2 equal lengths and 2 equal breadths.

Sum of all boundaries is

L + L + B + B

2L + 2B

2(L + B)

P = 2(12 + 7)

= 2(19)

= 38cm

What separation technique is used to separate a mixture water and ethanoll?

• Filtration

• Distillation

• Evaporation

• Precipitation

Answer explanation

Distillation is used to separate miscible liquids with different boiling points.

Water and ethanol are miscible with boiling points of 100°c and 78°c respectively. When heated, ethanol with the lower boiling point evaporates, is cooled through the condenser and collected first.

Which of the following is the electronic configuration for Nitrogen?

• 2, 5, 7

• 2, 2, 3

• 2, 8, 4

• 2, 5

Answer explanation

The atomic number of Nitrogen is 7 with electronic configuration 2, 5.

What is the largest number that is a factor of both 30 and 42?

• 6

• 2

• 12

• 5

Answer explanation

Factors of 30 and 42 are;

1, 2, 3, and 6.

The largest factor is 6.

Which expression is equivalent to 6p + 24 + 3p - 9?

• 3p + 5

• 3(p - 15)

• 3(3p + 5)

• 3(2p - 5)

Answer explanation

6p + 24 + 3p - 9

Collet like terms

6p + 3p + 24 - 9

Simplify

9p + 15

Factorize

3(3p + 5)

What block are the transition metals located?

• d block

• s block

• f block

• p block

Answer explanation

Transition metals constitute the d block elements, between group 3 and group 4 of the periodic table.

Examples of transition metals are Titanium, Copper, Iron, Nickel etc.

In the diagram above, what is the mass number of sodium atom?

• 12

• 22

• 11

• 23

Answer explanation

Mass number of an atom refers to the sum of the number of protons and neutrons.

11 protons + 12 neutrons = 23