Yes, they are the metric unit for time. You ALWAYS use seconds for measuring time in science.
You would typically use the metric unit of centimeters (cm) to measure the length of a mouse's tail. This unit is commonly used for measuring shorter lengths.
There is no such measurement. There is either metric measurement or not. Do you mean "fractions" of inches?
You would use millimeters (mm) to measure the thickness of a house key, as it is a small unit appropriate for measuring such dimensions.
Kilometers
None, really, because a gallon is not a metric unit. A litre is the appropriate unit to use for measuring volumes.
Yes, they are the metric unit for time. You ALWAYS use seconds for measuring time in science.
millimetres (or tenths of millimetres, if you have a micrometer)
A litre.
You best bet would probably be to use kilograms.
It depends on the width of the desk. You could use centimeters or meters.
You would typically use the metric unit of centimeters (cm) to measure the length of a mouse's tail. This unit is commonly used for measuring shorter lengths.
There is no such measurement. There is either metric measurement or not. Do you mean "fractions" of inches?
8 grams
I would use the metric unit is inches
You would use millimeters (mm) to measure the thickness of a house key, as it is a small unit appropriate for measuring such dimensions.
Milliliters is the metric unit to use for the capacity of a thimble.