Check all the phrases that accurately complete the following sentence:
A Bunsen burner can be ignited
when the gas supply is turned on.
when it is connected to a gas supply.
by holding the striker above the burner and
striking it.
when objects are nearby and can ignite.

Much of the general structure and physical properties of the interior of the earth are inferred from: a)deep oil and gas bore holes b)geologic investigations c)analysis of seismic waves d) study of volcanoes

Can someone me with these questions plz.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line