Science Flashcards
Which of these reduces friction?
Ball bearings
ball bearings are used to reduce friction between moving parts.
Which of these increases friction?
Car breaks, tire treads, and sandpaper
When a lobster grows a claw to replace one that was lost, the process is called?
Regeneration
An astronomical body that revolves around a larger body is called?
Satellite
How many atoms are in a single molecule of water?
3 atoms
According to the locations on the periodic table, argon, and neon are part of what group?
Noble gases
When scientists measure a liquid’s resistance to flow, they are measuring the liquid?
viscosity
Regeneration in man is limited to?
Healing of wounds
By definition, an aquifer is?
River bottom made up of gravel and sedimentary rock
To test the effectiveness of plant fertilizer, groups of plants are grown with different types of fertilizer. A control group of plants would?
Not be given any fertilizer
Using the list, which of the following presents the stages of the water cycle in the correct order?
1. water vapor cools
2. precipitation occurs
3. evaporation occurs
4. condensation occurs
5. sunlight heats pond water
5,3,1,4,2
Which of the following reproduces by spawning?
Fish
In chemistry, to be classified as an organic substance must contain?
Carbon atoms
Which of the following is a renewable resource?
Peanut oil
Which element does not contain any neutrons?
Hydrogen
Which of these is the best explanation of how a smooth round stone became smooth?
it was in a stream for a long time
Which of the following is the best illustration of centripetal force?
ice skater spinning on the ice
In a balanced aquatic ecosystem, which of the following would have the greatest population?
Plankton
If you place bean seeds between moist paper towels and watch the stem and leaves appear, you will see a demonstration of
Germination
Friction is a force that
opposes motion between two surfaces
Mollusks typically have?
Shells
if a jet is parked on a runway, the jet’s interia?
is equal to zero
What is the symbol for the Hydroxyl ion?
OH-
The chemical formula of a compound describes the elements the compound contains and the?
ratio of elements in a compound
What are the two main gases that make up the stars?
Hydrogen and Helium
Which of the following is a non-renewable resource?
Copper
What do a hydrogen molecule and an oxygen molecule have in common?
size and charge on each electron
The term “ meiosis” is usually associated with?
Reproduction
Which do the following enables the pen to work?
Hydraulic force
Which of the following actions produces a chemical change?
adding salt to the hot water
Chocking is prevented by the?
Epilogttis covering the voice box
the tympanic membranes are also known as
eardrums
perpetual motion machines can never be built because it is not possible to eliminate?
Inertia
Human skin cells divide by?
Mitosis
