Which laboratory apparatus is mainly used to measure temperature?, Balance, Beaker, Thermometer, Funnel, Which apparatus is best for measuring the volume of a liquid accurately?, Mortar and pestle, Test tube, Beaker, Graduated cylinder, A scientist wants to add a liquid one drop at a time. Which apparatus should be used?, Microscope, Dropper, Funnel, Balance, Mia wants to measure exactly 25 mL of water and then pour it into a container. Which apparatus should she use to measure the water?, Graduated cylinder, Test tube, Mortar and pestle, Beaker, Leo finds a tiny object that he cannot see clearly with his eyes. He needs to observe details that are too small to see clearly with the unaided eye. Which apparatus is most suitable?, Thermometer, Funnel, Balance, Microscope, Four students need different laboratory tools. Student W must measure the mass of a rock, X must measure the temperature of water, Y must crush a solid into powder, and Z must transfer liquid drop by drop. Which set correctly matches the students with their apparatus?, W–Beaker, X–Thermometer, Y–Balance, Z–Funnel, W–Balance, X–Funnel, Y–Beaker, Z–Microscope, W–Balance, X–Thermometer, Y–Mortar and pestle, Z–Dropper, W–Thermometer, X–Balance, Y–Dropper, Z–Mortar and pestle, Ana and Ben both have water. Ana needs to hold and mix the water with another substance. Ben needs to measure exactly 40 mL of water. Which apparatus should they choose?, Ana—dropper; Ben—test tube, Ana—beaker; Ben—graduated cylinder, Ana—funnel; Ben—beaker, Ana—graduated cylinder; Ben—beaker, A student must: Step 1: Measure 30 mL of water accurately. Step 2: Measure its temperature. Step 3: Add another liquid drop by drop. Which sequence of apparatus is best?, Graduated cylinder → Thermometer → Dropper, Beaker → Balance → Funnel, Balance → Graduated cylinder → Spatula, Test tube → Microscope → Funnel, What is the main purpose of a laboratory warning sign?, To tell us the name of the scientist, To show where experiments begin, To decorate the laboratory, To tell us about a possible danger, A container has a flammable sign. What does the sign mean?, The material must be frozen., The material can catch fire easily., The material can be eaten safely., The material is safe to heat., You see a wear safety goggles sign before an experiment. What should you do?, Cover your ears., Stay away from all laboratory equipment., Put on safety goggles to protect your eyes., Wash the goggles with chemicals., Leo sees an electrical hazard sign near a piece of equipment. His hands are wet. What is the safest action?, Dry his hands and wait for the teacher's instructions., Pour more water near the equipment., Ask a friend to touch it instead., Touch the equipment quickly., A bottle has a corrosive warning sign. A few drops accidentally spill on the laboratory table. What should Mia do first?, Touch the liquid to find out what it is., Wipe it with her bare hands., Tell the teacher immediately., Smell the liquid closely., Four students see a hot surface sign. Ana waits for the teacher before touching the object. Ben keeps his bare hands away from the hot object. Cara touches the object quickly because it does not look hot. Dan follows the teacher's safety instructions. Who is NOT following the meaning of the warning sign?, Cara, Ana, Ben, Dan, Which is an example of a chemical change?, Freezing water, Melting an ice cube, Cutting paper into pieces, Rusting an iron nail, What usually helps an iron nail rust?, Oil and plastic, Oxygen and water, Sugar and sunlight, Salt and sugar, Which change does NOT form a new substance?, An egg cooking, An ice cube melting, An apple turning brown, An iron nail rusting, Mia mixes vinegar and baking soda. The mixture quickly begins to fizz. What is the best explanation for the bubbles?, Carbon dioxide gas is being produced., The baking soda is turning into oxygen., The vinegar is freezing., Air is changing into water., Study the observations. P: Ice becomes liquid water. Q: An egg becomes firm when cooked. R: Water becomes ice. S: A cut apple becomes brown. Which pair shows chemical changes?, R and S, P and Q, P and R, Q and S, What is an element?, A substance that is always a solid, A mixture of many different materials, A pure substance made of one kind of atom, Anything that can be changed into water, What is the Periodic Table?, A chart showing only metals, A chart that organizes the elements, A list of liquids and gases, A table showing only chemicals found in laboratories, Which statement best describes a metal?, It cannot conduct heat., It must always be a gas., It is often a good conductor of heat and electricity., It is always soft and easily broken., Which of the following is a metal?, Carbon, Oxygen, Nitrogen, Copper, Which element is a nonmetal and a gas that humans need for breathing?, Oxygen, Copper, Gold, Aluminum, Which pair contains two noble gases?, Helium and neon, Oxygen and nitrogen, Iron and copper, Carbon and sulfur, Ella notices that a soft-drink can is light but strong enough to hold a drink. Which metal is commonly used to make such cans?, Carbon, Neon, Oxygen, Aluminum, Carlo sees a balloon filled with a gas that is lighter than air. Which element could be inside the balloon?, Carbon, Copper, Helium, Iron, A food maker adds a substance to a jar of food. The substance helps slow spoilage, so the food can stay good for a longer time. What word best describes the job of the substance?, Thickener, Preservative, Coloring, Sweetener, Lia forgot a container of food for several days. Later, she noticed an unpleasant smell, a change in appearance, and signs that the food was no longer good to eat. Which term best describes what happened?, Flavoring, Preservation, Spoilage, Freezing, Scientists use H₂O as the chemical formula for a substance we use every day for drinking, washing, and cooking. What does H₂O represent?, Oxygen, Salt, Carbon dioxide, Water

Session 4: Primary 2

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