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7d
Key Stage 3 Science
| Question | Answer |
|---|---|
| What is inherited variation caused by? | DNA / your genes |
| Give an example of continuous variation | Height / weight / foot length/ leaf length / heart rate |
| Define the term variation | The differences in characteristics between organisms in the same species. |
| Is the language you speak an example of inherited variation or environmental variation? | Environmental |
| Which physical environmental factor is the biggest issue in the desert? | High temperature / Not enough water |
| Describe one adaptation polar bears have to survive in their habitat. | White fur for camouflage / large feet for walking on snow and swimming / rough soles to grip ice/ small ears to reduce heat loss / thick fur to keep it warm |
| Define the term species | A group of organisms that can reproduce with one another to produce offspring that will also be able to reproduce. |
| Which two cells fuse together in fertilisation? | Sperm cell and egg cell |
| Give a reason why an organism might be nocturnal. | To find food more easily / to avoid predators / to avoid hot temperatures during the day |
| What type of graph would you need to draw to represent eye colours of students in year 7? | Bar Chart |
| Write out a food chain for a rabbit, owl and grass | Grass à Rabbit à Owl |
| What is the name given to the bell shaped curve that can be drawn on a graph showing continuous variation? | Normal distribution |
| Which of these organisms is a producer? Eagle, Oak Tree or Sheep. | Oak Tree |
| Define the term herbivore. | An organism that only eats plants |
| Natural Hair colour is an example or which type of variation? | Inherited variation |
| List something an organism might compete for. | Food, mates, territory, water, light |
| Energy that is stored in food is used in respiration to help animals move and keep warm. How else is this energy wasted? | Undigested /released in faeces or urine or waste |
| Using the food web in Q6, name the producer in the longest food chain | Grasses |
| Using the food web in Q6, explain what would happen to the population of mice if the grain crops died suddenly. | Population would decrease / they would die, due to lack of food |
| What is a pesticide? | A poison/chemical that kills pests |
| Draw a pyramid of numbers for the food chain Oak Tree--> Caterpillar--> Blue Tit --> Sparrow Hawk | The left of this picture. |
| Where does a producer get its energy from? | The sun / light energy / photosynthesis |
| Give an example of variation found in rose plants | Height / leaf length / stem thickness or width / number of flowers or leaves / colour of flowers or leaves / thorns or no thorns |
| Define "habitat" | The environment that an organism lives in |
| Define "population" | Group of the same species living in an area |
| Define "species" | Organisms that have similar characteristics and can reproduce to produce FERTILE offspring |
| Define "competition" | Organisms trying to gain a share of limited resources |
| Define "interdependence" | Organisms relying on each other for food and shelter |
| Define "ecosystem" | The living and non-living things in a given area |
| Define "producer" | A green plant or algae that makes its own food using sunlight |
| Define "consumer" | An organism that eats another organism |
| Define "decomposer" | Organisms that break down dead plant and animal material |
| Define "food chain" | A diagram to show the direction of energy transfer between organisms |
| State three things that plants compete with each other for | Light, space, water and mineral ions |
| State three things that animals compete with each other for | Food, mates, territory |
| State three things that organisms depend on each other for | Food, shelter and pollination |
| State the type of organism that all food chains start with | Producer |
| What will happen to the number of predators if the number of prey increases | The number of predators will increase |
| What will happen to the number of prey if the number of predators increases | The number of prey will increase |
| What does the arrow in a food chain represent? | The direction of energy transfer |
| Define "carnivore" | An organism that eats only other animals |
| Define "omnivore" | An organism that eats both animals and plants |
| Define "herbivore" | An organism that eats only plants |
| Define "biodiversity" | Having a wide range of different species |
| Define "species" | Organisms that have similar characteristics and can reproduce to produce FERTILE offspring |
| Define "adaptation" | Features that enable them to survive |
| Define "endangered" | Serious risk of extinction |
Created by:
Davenant Foundation School
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