3 Copy and complete the following sentences, writing a suitable word in each gap. a To melt or boil a pure substance, must be supplied. b During a change of state, the remains constant.

Jessie ran 5000 meters from the cops and an average speed of 6 meters / second before he got caught . how long did he run?

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

Marvin records scientific data about lake superior. for which property has marvin forgotten to use an si unit of measurement? shore length high temperature low temperature annual precipitation