which organ removes waste from the blood?, heart, lungs, kidneys, the main function of the skin in excretion is to...., remove sweat from the body, filter waste from the blood, remove carbon dioxide, how does the liver help in the process of excretion?, by forming urine, by breaking down poisons, by producing bile, a star is different from a planet because a star..., reflects light, produces its own light, moves around a planet, living and non-living things that interact in a particular area form a/an...., population, community, ecosystem, food chain, which of these is a producer?, goat, grass, mushroom, which of the following is not a unit of temperature, degree kelvin, degree fahrenheit, degree seconds, degree celsuis, which part of a thermometer show the temperature reading?, bulb, glass tube, mercury, scale, example of a non-renewable source of energy is ..., crude oil, water, wind, which activity harms the ecosystem?, bush burning, tree planting, composting, cutting down trees can lead to....., good rainfall pattern, increase oxygen, soil erosion, soil fertility, which organ pumps blood in the human body?, brain, heart, lungs, liver, what force pulls objects toward the earth?, magnetism, gravity, friction, energy, what is the boiling point of water?, 0°C, 100°C, 200°C, 50°C, which of these animals is a mammal?, snake, frog, lizard, dog, what do we call a baby frog?, calf, tadpole, cub, chick, what do we call the movement of the earth around the sun?, Rotation, Orbit, Spin, Revolution, why are green plants called producers?, They produce oxygen only, They eat animals, They make their own food, They absorb sunlight, what will happen if a plant does not get sunlight?, It will grow faster, It will make more food, It will not make food properly, which organ system helps transport oxygen in the body?, Circulatory system, Digestive system, Nervous system, when water changes into steam, what type of change is it?, Chemical change, Physical change, Biological change, why do we have day and night?, The Sun moves around Earth, Earth revolves around the Sun, Earth rotates on its axis, what type of energy is stored in food?, Light energy, Electrical energy, Heat energy, Chemical energy, why are metals used to make cooking pots?, they are soft, They are poor conductors, They conduct heat well, They are transparent, what happens to sound as it travels away from its source?, It becomes louder, It becomes softer, It stops immediately, It changes color, what is the main function of the skeleton?, Pump blood, Digest food, Protect and support the body, Produce oxygen, what is the movement of water from roots to leaves called?, Transpiration, Photosynthesis, Absorption, Circulation, which of the systems controls all activities in the body?, Digestive system, Respiratory system, Circulatory system, Nervous system, what happens when ice melts?, Solid to gas, Liquid to solid, Solid to liquid, Gas to liquid, what type of teeth are used for tearing food?, Incisors, Molars, Canines, Premolars.

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