Science 2023 - BECE

Science Paper 1

Question 1

The very hard greenish-black deposit around the corners of the teeth is known as

Question 2

When equal amount of water is poured on dry soil samples, the increase in weight per unit amount of soil would be highest in

Question 3

The following practices are cultural practices in crop production except

Question 4

An example of a mixture is

Question 5

Which of the following statements about acids are correct? I. They turn red litmus paper blue. II. They can be neutralized by bases. III. Citrus fruits contains acids.

Question 6

The practice of reducing the number of seedlings per stand for better growth is known as

Question 7

A herbal mixture has a volume of 200 m3 and a mass of 10,000 kg. Determine the density of the mixture.

Question 8

How many atoms are present in H2O2?

Question 9

Which of the following electronic components is not made of semi-conductors?

Question 10

Steam changes to liquid by a process called

Question 11

Which of the following body shapes facilitates movement in a fluid?

Question 12

Stirring of soil on vegetable beds is to I. improve aeration of soil. II. increase activities of soil organisms. III. increase water penetration in the soil. IV. reduce weed growth.

Question 13

The base of the N-P-N transistor normally

Question 14

One benefit of technology to industrialization is

Question 15

Contour ploughing is normally practiced on

Question 16

A pupil of mass 70 kg climbed a building of height 15 m. Determine the pupils potential energy at the top of the building. [g = 10 m-2]

Question 17

Which of the following pairs of structures are present in animal cells?

Question 18

Artificial satellites can be used for I. communication. II. oil and gas exploration. III. meteorological studies.

Question 19

The image formed by a plane mirror is always

Question 20

The following practices are principles in crop production except

Question 21

Which of the following pairs of elements is in the same period in the periodic table?

Question 22

The daily variation of atmospheric conditions is called

Question 23

To test for starch in a green leaf, it is usually boiled to

Question 24

The following effects are as a result of soil erosion except

Question 25

If all the products have equal volumes, which of the product(s) would have the highest density? Given masses: X=0.05 kg, Y=50 mg, Z=500 g, W=0.05 g.

Question 26

Which of the products have the same mass? Given masses: X=0.05 kg, Y=50 mg, Z=500 g, W=0.05 g.

Question 27

Which of the following ions is formed by the loss of 2 electrons?

Question 28

The farming system that makes the most effective use of land is

Question 29

An example of a natural source of light is

Question 30

The SI unit that is derived is

Question 31

The grouping together of many stars is known as

Question 32

The current in a resistor is 3A. If the resistance of the resistor is 4 ohms, determine the potential difference across the resistor.

Question 33

Anemometer is an instrument for measuring.

Question 34

Which of the following statements distinguishes arteries from veins?

Question 35

The element used in the manufacturing of electronic components is

Question 36

Which of the following factors has the greatest influence on vegetable crop production?

Question 37

The brightest of all the planets is

Question 38

The use of separating funnel is most appropriate for separating which of the following mixtures?

Question 39

When a ray of light travels from a dense medium into a denser medium, it

Question 40

The two main particles in the nucleus of an atom are