Sweet Sciences

Which characteristic of living organisms involves chemical reactions in cells that break down nutrient molecules and release energy?

• Excretion

• Nutrition

• Respiration

• Sensitivity

The diagram shows a cell as seen with a microscope. Which label is correct?

• A

• B

• C

• D

Imagine you carry out vigorous exercise for 10 minutes. Which statements are correct for what happens during the exercise?

• The pulse rate increases

• Blood vessels turn bigger

• The deph of breathing increases

• The rate of breathing increases

Which diagram represents particles in a gaseous element?

• A

• B

• C

• D

Period 3 of the periodic table is shown. Which statement about these elements is correct?

• All the elements are metal

• All the elements are non-metals

• Metallic character decreases from Na to Ar

• Proton number decreases from Na to Ar

The word equation for the reaction between hydrogen and copper oxide is shown. Which substance, shown in the word equation, is reduced in the reaction?

• Copper

• Copper oxide

• Hydrogen

• Water

A vehicle is taken from the Earth to the Moon where the gravitational field strength is smaller. How do the mass and the weight of the vehicle on the Moon compare with their values on the Earth?

• Smaller mass and smaller wieght

• Smaller mass and same weight

• The same mass and smaller weight

• The same mass and the same weight

Two forces act on an object as shown. What is the resultant force on the object?

• 14 N to the left

• 14 N to the right

• 18 N to the left

• 18 N to the right

The image shows the part of an insect-pollinated flower State the letter that identifies the part where fertilisation occurs

The image shows a photomicrograph of blood. State the letter for red blood cell