1) Billy breathes air into his lungs. Oxygen moved from the air into his red blood cells. How? a) By diffusion b) By active transport c) By homeostasis d) By osmosis 2) Fill the blank in this sentence: The air Billy breathes in contains .................... the air he breathes out. a) less oxygen than b) the same amount of oxygen as c) more oxygen than 3) The blood going into Billy's lungs contains .......................... the blood leaving his lungs. a) less oxygen than b) the same amount of oxygen as c) more oxygen than 4) The air Billy breathes out contains more .......................... than the air he breathes in. a) nitrogen b) carbon dioxide c) urea 5) Lithium has a particular position on the periodic table. Which is the best explanation for why? a) The elements are arranged in groups b) The elements are arranged in order of mass c) The elements are arranged in order of proton number d) The elements are arranged in order of neutron number 6) How many electrons does eachatom of lithium give off when it reacts? a) 1 b) 2 c) 3 d) 4 7) Finish this chemical equation for the reaction of lithium with water: 2Li + 2H20 -----> a) 2NaOH + H2 b) LiO + H c) 2LiOH + H2 8) A small plane is speeding up along a runway. Which distance-time graph shows a steadily increasing speed? a) A b) B c) C d) D 9) The planes exerts 6000N of force on the runway. After 10 s it reaches takeoff speed (30 m/s) from a standing start. What is the aircraft momentum when it takes off? a) 18000 kg m/s b) 3000 kg m/s c) 6000 kg m/s d) 36000 kg m/s 10) As it moves along the runway the plane has an average speed of 15 m/s. Why is this different from the takeoff speed of 30 m/s? a) The counter force of friction increases as the plane speeds up. b) Average values are always less than instantaneous ones. c) The takeoff speed is always double the average speed. d) The instantaneous speed of the plane changes as it moves along the runway.

Quiz7

by Anonymous
Embed

Leaderboard

Visual style

Options

Switch template

Continue editing: ?