A thermometer label says: “Clean the tip with alcohol before and after each use.” When should the tip be cleaned?
- AOnly once a week
- BOnly after each use
- COnly when it looks dirty
- DBefore and after each use
A thermometer label says: “Clean the tip with alcohol before and after each use.” When should the tip be cleaned?
When a hedgehog is frightened, it rolls into a tight ball. Its sharp spines then stick out in all directions, protecting its soft belly. What does a hedgehog do when it is frightened?
An ambulance siren sounds higher as it comes towards you and lower as it moves away. This change in sound is called the Doppler effect. What is the Doppler effect, according to the passage?
“Eating more fibre, drinking water and being active can help prevent constipation.” Which advice would the author most likely give?
“When the coach announced that Sam would start in the final game, Sam’s face lit up.” What does “Sam’s face lit up” mean?
“The word ‘biology’ comes from two Greek words: ‘bios’, meaning life, and ‘logos’, meaning study.” What does “biology” mean, according to the passage?
The author writes: “I have walked to work for twenty years, rain or shine. I have never once needed a car, so no one in this city needs one.” What is the main weakness?
A survey on a fitness website asked visitors, “How many days a week do you exercise?” Most answered five or more. The website reported, “Most adults exercise five days a week.” Why is this conclusion questionable?
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