WorksheetsExploring Science: Grade 7
Total questions: 12
Worksheet time: 6mins
What are the main functions of the circulatory system?
Regulate blood pressure only
Store excess nutrients
The main functions of the circulatory system are to transport blood, deliver oxygen and nutrients, remove waste products, and regulate body temperature.
Produce hormones for digestion
Name the four types of human body tissues.
Connective, muscle, epithelial, respiratory
Epithelial, skeletal, adipose, lymphatic
Nervous, muscle, digestive, skeletal
Epithelial, connective, muscle, nervous
What is the role of the respiratory system in the human body?
The role of the respiratory system is to facilitate gas exchange, providing oxygen to the body and removing carbon dioxide.
To regulate body temperature and maintain homeostasis.
To circulate blood throughout the body.
To digest food and absorb nutrients.
Describe the process of photosynthesis in plants.
Photosynthesis is the process by which plants convert light energy into chemical energy, producing glucose and oxygen from carbon dioxide and water.
Photosynthesis is the process of plants breathing in carbon dioxide.
Photosynthesis occurs only at night in plants.
Plants absorb nutrients from the soil through photosynthesis.
What are the stages of a plant's life cycle?
Photosynthesis, Dormancy, Maturity
Transpiration, Respiration, Decay
Germination, Seedling, Vegetative, Flowering, Pollination, Seed Production
Germination, Growth, Harvesting
How do plants reproduce?
Plants reproduce only through spores.
Plants reproduce by absorbing nutrients from the soil.
Plants reproduce sexually through flowers and seeds, and asexually through methods like runners and cuttings.
Plants reproduce exclusively through cloning.
What is a chemical reaction?
A chemical reaction is a method of measuring the weight of substances.
A chemical reaction is when substances are heated to produce light.
A chemical reaction is a process where substances (reactants) are transformed into different substances (products) through the rearrangement of atoms.
A chemical reaction is the process of mixing two liquids without any change.
What are the signs that a chemical reaction has occurred?
Solid dissolving in a liquid
Mixing two liquids without any change
Signs of a chemical reaction include gas formation, color change, temperature change, precipitate formation, and light or sound emission.
Water boiling at 100°C
What is the difference between an endothermic and exothermic reaction?
Endothermic reactions release heat; exothermic reactions absorb heat.
Endothermic reactions absorb heat; exothermic reactions release heat.
Both endothermic and exothermic reactions absorb heat.
Endothermic reactions occur only in gases; exothermic reactions occur only in liquids.
Give an example of a chemical reaction that occurs in everyday life.
Baking a cake
Rusting of iron
Combustion of gasoline in a car engine.
Photosynthesis in plants
What is the role of enzymes in chemical reactions?
Enzymes change the products of the reaction into different substances.
Enzymes speed up chemical reactions by lowering activation energy.
Enzymes slow down chemical reactions by increasing activation energy.
Enzymes are consumed in the reaction and cannot be reused.
How do human body systems work together to maintain homeostasis?
Human body systems work together through feedback mechanisms to regulate internal conditions, ensuring stability and balance.
Body systems operate independently without interaction.
Homeostasis is maintained solely by the nervous system.
Only the respiratory system is responsible for homeostasis.
