Ks3 bio
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145 questions
| 🇬🇧 | 🇬🇧 |
| Where an organism lives | Habitat |
| Conditions in a habitat | Environment |
| An environment is affected by non-living factors (light, dampness, temperature) | Physical environmental factors |
| As conditions change the organisms respond eg nocturnal animals are only active at night | Physical environmental factors change daily |
| Organisms respond to these changes for example in autumn some birds migrate to warmer countries to feed during the winter | Physical environmental factors change seasonally |
| Allow organisms to survive a habitat | Adaptations |
| Fish are adapted to living under water they have gills to take oxygen out of water, fins to swim with and streamlined bodies to help them move easily through the water | Give an example of an adaptation |
| Organisms that have better adapted | Which organisms have a better chance or survival |
| The difference between organisms | Variation |
| Variation that has a continual range | Continuous variation |
| Variation that only has certain values | Discontinuous variation |
| Variation that is caused by the environment | Environmental variation |
| Caused by features being passed from parent to thief offspring during reproduction | Inherited variation |
| Bones and muscles and legs you move | What does the locomotor system consist of |
| To width stand knocks and pressure | Why are bones hard |
| So they are easy to move | Why are bones light |
| Containing bone marrow where bold cells are made | Why do bones have a hollow center |
| Muscles are controlled by the nervous system, impulses from the brain travel down the spinal cord and along the nerves to muscles | What are muscles controlled by |
| Muscles have adapted to their function by containing strands that can shorten to produce a pulling force. This requires energy form respiration | How have muscles adapted to their function |
| Are carried to the muscles in the blood. Nutrients are carried in the plasma while oxygen is carried in the red blood cells, blood also contain white blood cells which attack micro-organisms | How are the oxygen and nutrients required for respiration carried |
| Breathing is the movement of muscles in your diaphragm and between the ribs, which cause the changes in the volume of the lungs | What is breathing |
| Medicines are drugs that can help people who suffer from diseases | What are medicines |
| Drugs that slow down your nervous system. It alters behavior and slows reaction times | What are depressants |
| Drugs that speed up the nervous system | Stimulants |
| Animal cell | Draw and label a plant and animal cell |
| 1- keeps the cell together and controls what goes Into and out of the cell 2- control the cell 3-where activities happen, including respiration 4-contains chlorophyll to trap sunlight for photosynthesis 5-made of cellulose and provides support 6-storage space | What are the functions of Cell surface membrane Nucleus Cytoplasm Chloroplast Cell wall Vacuole |
| Is used to magnify tiny things such as cells | Function of a microscope |
| = magnifications of objective lens * magnification of eyepiece lens | Formula for total magnification |
| 1- the object you look at 2- used to help you see parts of the cell 2- holds object for examination 3-stops specimen drying out Hold it flat Stops it moving | What is a Specimen Slide Stain What is the function of a cover slide |
| Muscle cells- shape to move things Fat cells- in animals store fat | What are the special functions in animal cells |
| Root hair cells- take in water Xylem cells - carry water | What are the special functions in plant cells |
| 1- windpipe, lungs - takes air into the body and gets rid of waste gases 2- heart, blood vessels - carries oxygen and food around the body 3- mouth, gullet, stomach, intestines - breaks down food 4- brain, spinal cord, nerves - carries signals around the body 5- muscles, bones - allows movement | What oragans and job for Breathing system Circulatory system Digestive system Nervous system Locomotor system |
| Glucose + oxygen ———> carbon dioxide + water Energy is released (but is not a chemical substance and so it is not shown in the word equation ) | Aerobic respiration word equation |
| Lime water (which turns cloudy) An indicator (such as hydrogen carbonate) because it is acidic | What can carbon dioxide be detected using |
| Number of breaths in one minute | Breathing rate |
| This is because your cells need more oxygen and glucose for respiration | Why does your breath rate and pulse rate increase when you exercise |
| Ventilates | What does breathing do to the lungs |
| - makes arteries narrower and causes heart disease - can cause cancer, coats lungs reducing surface area, can cause alveoli to break apart -Stops red blood cells carrying do much oxygen - stops cilia working so lungs are not cleaned and mucus collects | What harm do these ingredients in smoke cause Nicotine Tar Carbon monoxide High temp of smoke |
| 1- starch and sugars - for energy (in respiration) 2- blank - for growth and repair 3- vitamin c - for heath 4- calcium - for health 5- blank - for health (help stop constipation ) 6- blank - for health (water dissolved substances and fills up cells) | Example and why we need them of Carbohydrates Protein Vitamin Minerals Fiber Water |
| Levels of activity (more active people need more energy) Age (teenagers need more energy from food than adults) Gender (boys need more than girls) | The amount of energy a person needs depends on |
| Kilojoules (kJ) | What is the amount of energy measured in |
| Malnutrition | What are starvation and obesity forms of |
| Deficiency diseases such as scurvy (lack of vitamin C) | What are other forms of malnutrition |
| ... | What are the steps in the digestive system |
| The range of species in an area | What is biodiversity |
| Organisms are interdependent We won’t be able to make use of organisms if they are extinct More bio diverse areas recover better from natural disasters | We should preserve bio diversity because |
| Inside flowers | Where are reproductive organs contained in plants |
| -brightly colored petals -scented flowers with nectarines -sticky stigma to take the pollen off the insects as it goes from plant to plant to feed inside the nectaries | What are the features of a plant that help insect pollination |
| - usually small dull petals on the flower -no scent or nectaries - long filaments hang anthers outside of flowers so lots of pollen is blown away - stigmas are feathery to catch pollen as it’s carried past by wind | What are feature of a plant that help wind pollination |
| Getting pollen to the stigma to make a seed | What is pollination |
| Stamen and stigma | What two organs are involved in pollination |
| Seed dispersal, which stops new plants from competing with the parent plants for water, space, light and nutrients | A part of the flower uses a fruit what is that fruit used for |
| The development of a seed or spore | What is germination |
| The root grows first then the shoot, finally new leaves open and photosynthesis can start in the chloroplast. The glucose from photosynthesis is turned into starch to be stored | How does a plant grow |
| Light, air, water,warmth and nutrients called mineral salts (LAWWN) | What does a growing plant need |
| Pollen is transferred from the stamen to the stigma of the same plant which means 1 parent plant is able to reproduce offspring | Asexual reproduction |
| Offsprings inherit characteristics from their parents and these characteristics vary | Inherited variation |
| Genetic information contained in a code in DNA | What are organisms characteristics controlled by |
| James Watson and Francis crick | What scientists discovered the structure of DNA |
| A long molecule of DNA | What does each chromosome contain |
| Certain sections of DNA molecules contain the genetic information | What are genes for kids |
| 23 | How many different types of chromosomes are there in humans |
| Two copies | How many copies of each do most cells have |
| One copy | How many copies do gametes have |
| Change in physical environmental factors Competition from other organisms Disease Human activities (hunting, clearing habitats, using poison) | Changes in an ecosystem can cause species to become endangered or extinct this is usually due to |
| Number of species | Biodiversity |
| Protecting areas and setting up nature reserves Setting up breeding programmed in zoos Banning the hunting of some animals or the collecting of wild plants Setting up gene banks(to store parts of organisms such as seeds and gametes) | We can try to stop this happening and preserve biodiversity by |
| Organisms are interdependent We won’t be abele to make use of organisms if they become extinct More biodiversity areas recover better from natural disasters | We should preserve bio diversity because |