F1-1 Science Test 1 Ch 1 True or False

Scientists only study one branch of the science.

FALSE

The study of genetics helps scientists find ways to diagnose diseases such as Down syndrome.

TRUE

All scientific inventions are beneficial for human beings.

FALSE

We rely on different senses to make observations.

TRUE

If the experimental results do not support a hypothesis, a scientist may propose another hypothesis and test again.

TRUE

Controlled variables should be changed in a fair test.

FALSE

If a corrosive chemical is spilled over the bench, we should dilute it with water at once.

FALSE

Medical care is not needed after taking the first aid after a laboratory accident.

FALSE

The hazard warning symbol on the right means explosive.

FALSE

Hazard warning symbols on the reagent bottles are used to show the names of the chemicals stored in the bottles.

FALSE

We should check the hazard warning symbols of a chemical after using the chemical.

FALSE

Pouring water onto objects on fire is always the best way to put out the fire because water can lower the temperature.

FALSE

Carbon dioxide-type fire extinguishers put out a fire by removing the fuel.

FALSE

The windows of the laboratory should always be closed to provide a stable environment for doing experiments.

FALSE

We must carry out experiments in the laboratory.

FALSE

All types of fire extinguishers put out a fire by lowering the temperature.

FALSE

Carbon dioxide can be used to put out a fire.

TRUE

To take the readings of a thermometer, we should keep the liquid level of the thermometer at our eye level.

TRUE

When a solution is transferred to a test tube of distilled water using a dropper, the solutions should be sucked up and down to mix the solutions well.

FALSE

We should not hold a dropper upside down.

TRUE