Ques: Flowing water can slowly dissolve carbon in sedimentary rock, and sedimentary Rocks One of the commonest sedimentary rocks is sandstone. Given these facts, flowing water can slowly dissolve carbon in what among the following options: - oil - water - crust - ice - loose dirt - sandstone - precipitation - loose soil
Ans: sandstone

Ques: Afire requires oxygen to burn, and oxygen-enriched air is a fire hazard because the burning rate of combustible materials is increased. Given these facts, how do you increase the burn rate among the following options: - an electric stove - exercise - burn wet materials - friction - add more oxygen - decrease amount of fuel - a hydraulic system - decrease the oxygen
Ans: add more oxygen

Ques: Abalance is used for measuring mass of an object, and an object has no mass at absolute zero. Given these facts, what object cannot be measured by a balance among the following options: - layers of fat - One at absolute zero - Warm air moving into cold air - all matter - direct damage to the lungs - slow and inefficient - movement of tectonic plates - Continents drifting
Ans: One at absolute zero

Ques: Arainbow is formed by refraction of light by separating light into all different colors, and light passing through a prism is refracted or divided into the colors of the spectrum. Given these facts, what object can be used to create a rainbow among the following options: - power - refracted - the sun - arc - lenses - flowers - prism - leprechauns
Ans:
prism