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Which of these substances is acidic?
A substance that turns red litmus paper blue is a(n) ___.
Which device is used to measure electric current in a circuit?
Which instrument is used to measure temperature?
Heat flows from a ___ body to a ___ body.
The basic unit of time in the SI system is the ___.
The process by which green plants make their own food is called ___.
Animals that depend on other organisms for food are called ___.
Which of these is a chemical change?
The day-to-day condition of the atmosphere at a place is called ___.