A bottle shows the oxidizing symbol (a flame over a circle). What is the best storage precaution listed?

Which statement best matches the flammable label (flame icon)?

Which pair correctly matches the label to the recommended precaution?

A substance can damage health or even cause death if breathed in, swallowed, or absorbed through skin. Which label applies, and what extra storage step is advised?

Which general safety rule is stated for accidents during experiments?

Which personal protective equipment is specifically mentioned when heating is needed?

Which apparatus is designed as a small cylindrical tube with a rounded bottom and is commonly used to hold small amounts of substances during experiments?

A wider, heavier version of a test-tube intended for heating substances directly over a flame is called a:

Which apparatus is a heat source typically shown with a vertical barrel, air hole, and base?

Identify the container often drawn with a wide mouth and spoutless straight sides, used for mixing and heating liquids in larger volumes.

Which item is specifically used to safely hold a test-tube when it is hot?

You need to support a beaker over a Bunsen burner. Which apparatus combination is most appropriate?

Which apparatus is best used to transfer small drops of liquid accurately?

You are setting up a filtration. Which pair of items should be used together?

Which apparatus is specifically used for holding or heating a small quantity of liquid?

Which combination is correctly matched to its use for heating a beaker of liquid?

What is the main purpose of a dropper in the laboratory?

Which instrument would you choose to measure the volume of a liquid sample accurately?

During an experiment, a student must separate a solid from a liquid. Which pair of items should be used together?

Which statement best describes how scientists proceed during an investigation?

A student wants to evaporate a very small quantity of a solution in air. Which apparatus is most suitable?

Which laboratory instrument is specifically used to measure temperature?

In a laboratory, which apparatus is primarily used to heat substances?

Which unit would be most appropriate to report the time measured with a stopwatch?

The beaker shown in laboratory diagrams is best used for which action?

Which instrument would you use to get the volume of a liquid accurately, as hinted by 'measuring ________'?

Which science quantity is matched with the unit centimeter (cm)?

Which science quantity is measured in kilograms (kg)?

Which apparatus name correctly completes the hint: 'We use a stop-_____ to measure time'?

According to the hints, what place is described by 'We do experiments there'?

Which laboratory item is used with filter paper to separate a solid from a liquid?

Which apparatus is shown by the triangular-flask outline in the hints?

Which tool would be most suitable for measuring the length of a small object, as depicted by the straight scaled diagram?

Which dish is heated to obtain salt crystals from a salt solution, as suggested in the hints?

Which item completes the phrase '________ burner' commonly used for heating in a lab?

Which apparatus is designed mainly for transferring liquids from one container to another to avoid spills?

Which unit pairs correctly with temperature as measured by a thermometer in this context?

Which science quantity would be recorded in seconds using a stop-watch?

Which apparatus is best for mixing solutions with less risk of spillage due to its narrow neck?

What is the most appropriate instrument for measuring the mass (weight) of an object as indicated by the hints?

Which container is commonly used for holding liquids and rough volume estimates but not precise measurement?

A class measured the boiling temperature of water. The results from eight groups were: 98, 99, 101, 102, 100, 97, 101, 102 (in degrees). What information is missing from the table that students should include with each result?

Using the boiling temperature results 98, 99, 101, 102, 100, 97, 101, 102, what is the mean (average) temperature to the nearest whole number?

A dot plot shows fish lengths (in cm). Counts by length are: less than 8 cm: 0; 8 cm: 2 fish; 9 cm: 1 fish; 10 cm: 3 fish; 11 cm: 2 fish; 12 cm: 0 fish; 13 cm: 1 fish; 14 cm: 1 fish; more than 14 cm: 1 fish. How many fish are longer than 10 cm?

Based on the same fish-length dot plot, how many fish were caught in total?

From the dot plot of fish lengths, if one more fish were caught, which length is most likely based on the mode of the data?

From the fish-length data, what is the probability of catching a fish of 6 cm on the next try?

Science is the study of things around us. Choose the best answer.

Scientists must be very good in mathematics. Choose the best answer.

Scientists are curious and have good powers of observation; without these, you cannot become a scientist. Choose the best answer.

A school science laboratory must have a first aid box and fire-fighting equipment like a fire extinguisher. Choose the best answer.

All used chemicals should be poured into the sink and washed away at once. Choose the best answer.

Wear safety goggles every time you are in the laboratory. Choose the best answer.

We should handle all chemicals with great care. Choose the best answer.

We should report any accident or damage to the teacher at once. Choose the best answer.

If acid spills on hands, we should dial 999 at once for help. Choose the best answer.

To transfer a liquid or solution, we use a dropper. Choose the best answer.

Excess chemicals should be returned to their bottles to save chemicals. Choose the best answer.

The temperature of a Bunsen flame can be measured by placing the bulb of a thermometer in the flame. Choose the best answer.

Flammable liquids must not be heated directly with a naked flame. Choose the best answer.

To boil water quickly, we use a Bunsen burner with the air-hole closed. Choose the best answer.

Technologists make things using tools and machines to bring engineers’ plans into physical reality. Choose the best answer.

Which labeled part in the heating setup diagram shows the Bunsen burner?

In the setup, which label indicates the wire gauze used to support the beaker during heating?

Identify the apparatus labeled i in the diagram of the heating setup.

Which label corresponds to the tripod in the heating arrangement?

What is the correct name of the apparatus shown as a long narrow cylinder with graduations and a stable base labeled c?

Which diagram shows a funnel used to pour liquids safely?

In the heating setup, which label e or g represents the base plate of the apparatus?

Which component directly supports the wire gauze in the heating setup?

Which apparatus would you choose to measure a fixed volume of liquid accurately?

Which apparatus is best for transferring a small quantity of liquid drop by drop?

Which apparatus is used to measure the length of your book?

Which instrument should be used to measure the time interval of a race?

Which device would you use to measure the weight of your book?

Which hazard label best matches LPG gas?

Which hazard label should be associated with concentrated acid?

Which hazard label is most appropriate for benzene?

Which hazard label should be matched with mercury due to its poisonous nature?

Which of the following is incorrect about science?

A teacher gives students a sealed black box. Observations: it rings when shaken and something inside seems able to roll or slide. Which guess is the most scientific?

We should not enter a science laboratory unless which of the following persons is/are present? (1) teacher (2) laboratory technician (3) class captain

Which hazard warning label is commonly found on a correction pen?

To measure our body temperature we use which instrument?

What is the volume of liquid in the illustrated measuring cylinder? The meniscus sits between the 6 mL and 8 mL marks, closer to 7.4 mL.

Referring to the measuring cylinder diagram, which eye position is correct for taking the reading at the meniscus?

Which of the following can be used as a unit for volume? (1) $$cm^3$$ (2) $$mL$$ (3) $$m^2$$

Which best describes the length of an AA or AAA dry cell?

Which best describes the hand span of a Secondary 1 student?

Look at the thermometer drawing showing water in a beaker. The liquid column is just above the 15°C mark and below 20°C, aligned with the small tick after 15°C. What is the temperature of the water?

Which of the following is not needed to measure the volume of a copper coin with an irregular shape using water displacement?

Which of the following is not needed to measure the volume of a sugar cube?

A student must transfer some liquid from a small reagent bottle to a test tube using a dropper. Which sequence shows the correct order? (1) Put the lower part of the dropper in the liquid. (2) Squeeze the rubber bulb of the dropper. (3) Take the dropper to the test tube. (4) Squeeze the bulb. (5) Rinse the dropper.

Which diagram shows the correct way to heat liquid in a test tube? Consider the following features: test tube held with holder at an angle, mouth pointing away from people, and heating near the liquid level, not at the sealed end.

Arrange the steps to light a Bunsen burner to obtain a non-luminous flame. Steps: (1) Trigger a lighter (2) Turn on the gas supply (3) Close the air hole (4) Adjust the size of the air hole (5) Place the lighter over the chimney of the burner

A very light and wet coin is placed over the mouth of a glass bottle so it just covers the opening. The bottle is held in warm hands. What happens and why?

In the setup shown, a flask is inverted in water with a narrow tube through the stopper. The setup is gently warmed. What will be observed?

For a fair test, what must be kept constant? (1) Controlled variables (2) Independent variable (3) Dependent variable

A beaker of water at the 50 cm³ mark is poured into a measuring cylinder. What is the volume of liquid inside the measuring cylinder?

Four identical marbles are put into the measuring cylinder without splashing. The new volume reads 76 cm³. What is the volume of one marble?

How many more identical marbles can be added before the water level rises above the 100 cm³ mark?

Two equal samples of 45 cm³ of water at 25°C are heated. Setup X uses a blue Bunsen flame; setup Y uses a yellow Bunsen flame. Predict what will be observed.

Which hazard warning label should be placed on a bottle of poisonous liquid?

A graph shows Alice’s heartbeat rate (beats per minute) over time from 0 to 80 minutes. At rest it is about 60 bpm, rises steeply starting near 20 minutes to around 100 bpm, remains near 100 bpm until about 40 minutes, then falls back to about 60 bpm by 60 minutes and stays constant. At what time does Alice start exercising?

Based on the heartbeat graph, for how long does Alice exercise (period with elevated rate around 100 bpm before dropping)?

What is the increase in Alice’s heartbeat rate after she has exercised for 15 minutes? Use the graph to compare her rate at the start of exercise and at 15 minutes after starting.

On the heartbeat graph, what does the area under the curve during the exercise period represent?

Alice tests two fertilizers, P and Q, using two identical plants in identical pots and soil. She places one plant indoors and the other outdoors, waters them equally, and adds equal amounts of P to one and Q to the other. After one week, both plants look similar in size as shown. What conclusion can she draw?

People who carry out science research work are called what? Choose the best term.

In which place should experiments be conducted?

There are a lot of what in a laboratory?

During an experiment, what should we do first?

Which action ensures numerical precision in experiments?

Which action involves writing down results during an experiment?

What should we do after thinking about the results of an experiment?

Which hazard symbol shows a flame and means the substance can burn easily?

Which hazard symbol shows an 'X' and warns of substances that can cause irritation?

Which hazard symbol shows test liquid damaging a hand and a solid surface?

Which hazard symbol shows a skull and crossbones?

Which unit symbol is suitable for our body temperature?

Which unit symbol is suitable for the weight of a bag of rice?

Which unit symbol is suitable for the weight of a sugar cube?

Which unit symbol is suitable for the distance between Beijing and Hong Kong?

Which unit symbol is suitable for the height of a house?

When lighting a Bunsen burner, which tubing connects the gas tap and the burner?

Before lighting, what should you do to the air-hole to obtain a yellow safety flame?

After placing a lit match over the chimney, what should you do next?

To obtain a suitable flame, what should you adjust on the Bunsen burner?

If the air-hole is closed, what color is the flame?

If the air-hole is open, what color is the flame?

In measuring, what do we use?

A solid dissolves in water to give a what?

We can remove water from a solution by which process using an evaporating dish?

Which apparatus is shown in photo A (a small glass tube closed at one end)?

Which apparatus is shown in photo B (a 250 mL container with spout and markings)?

Which apparatus is shown in photo C (tall cylinder with scale for measuring volume)?

Which apparatus is shown in photo F (protective eyewear)?

Which item is specifically used to protect your eyes during laboratory work?

Which piece of equipment is used to heat substances by producing a flame?

Which apparatus is best for holding and heating liquids rather than measuring exact volumes?

Which item is designed for adding small amounts of liquid one drop at a time?

Which component spreads heat evenly under a beaker when placed on a tripod?

Which item should be placed under a hot apparatus to protect the bench surface?

What is the correct next step if an experiment’s conclusion does not agree with the hypothesis?

Which of the following is a valid reason why some discoveries or inventions can be harmful?

Which is the best precaution when heating a liquid in a test tube?

Which pair lists two appropriate general laboratory safety rules?

Which label purpose on chemical bottles is most accurate?

Which set correctly lists fire-fighting equipment commonly found in a science laboratory?