Unit 2 Flashcards
Carbon is ___________.
an element
a proton
a molecule
a neutron
an element
What are molecules?
Molecules are made of atoms.
Molecules are used to break apart atoms.
Molecules are used to hold atoms together.
Molecules make up atoms.
Molecules are made of atoms.
A shared pair of electrons
Covalent
Ionic
Hydrogen
Covalent
Electron transfer from one atom to another, resulting in an attraction between oppositely charged ions
Covalent
Ionic
Hydrogen
Ionic
Electrostatic attraction between areas of molecules with opposite partial charges
Covalent
Ionic
Hydrogen
Hydrogen
Strongest bond?
Covalent
Ionic
Hydrogen
Covalent
Moderately strong?
Covalent
Ionic
Hydrogen
Ionic
Weakest bond?
Covalent
Ionic
Hydrogen
Hydrogen
Which subatomic particle is involved in forming bonds with other atoms?
Electrons
Nucleus
Neutrons
Proton
Electrons
Which subatomic particle is the smallest?
Atom
Electrons
Neutron
Proton
Electrons
Which subatomic particles are about the same size?
Protons and electrons
Electrons and neutrons
Protons and neutrons
Protons and neutrons
Which subatomic particles are found in the nucleus?
Neutrons and electrons
Protons and electrons
Protons and neutrons
Protons and neutrons
Which type of bonding would occur between two oppositely charged ions?
Covalent
Hydrogen
Ionic
Ionic
A large molecule forms by linking together smaller molecules and then folding the chain of molecules into a specific shape. As it folds, it forms weak interactions with distant parts of the same molecule that hold the folds in place. Which types of bonds would most likely be holding the folds in place in this scenario?
Covalent
Hydrogen
Ionic
Ionic
An atom loses an electron and then is attracted to a different atom that has an extra electron. What type of bond does this describe?
Ionic
Covalent
Hydrogen
Ionic
A carbon atom bonds with four different hydrogen atoms to form the molecule methane. The carbon and the hydrogen atoms stay close together so that, collectively, they have full electrons shells as electrons are able to fill a spot in a shell of more than one atom. What kind of bond does this describe?
Ionic
Covalent
Hydrogen
Covalent
If two atoms both lose one electron each, will they form an ionic bond with each other?
No, because they will have the same charge.
Yes, because charged atoms form ionic bonds.
No, because their electron shells will be full.
Yes, because atoms bond together ionically.
No, because they will have the same charge.
Water molecules within these cells will also bind to each other. What is this called?
Solution
Cohesion
Surface tension
Adhesion
Cohesion
Water can bind to the walls of these cells because they are _________.
polar
nonpolar
polar
When water binds to the walls of the cells, this is called _________.
adhesion
cohesion
solution
surface tension
adhesion
Water molecules binding to each other is called __________.
polarity
cohesion
solution
adhesion
cohesion
water molecules binding to other molecules is called ___________.
polarity
cohesion
solution
adhesion
adhesion
Which characteristic of water allows a paper clip to float on the surface of the water?
Temperature stability
Expansion on freezing
Solubility
Surface tension
Surface tension
If the plant gets too dry, the water column can break. This creates an air bubble in the xylem.
What happens to the water when the air bubble forms?
The pressure of the air bubble forming will force the water to spring back into a continuous column.
The water is still adhering to the xylem walls, but the water column is no longer continuous.
Nothing will happen. Water can travel through the air bubble and maintain the same continuous stream as before.
There is no longer anything holding the water in the tube, so it will collapse down to ground level.
The water is still adhering to the xylem walls, but the water column is no longer continuous.
As water drips from a faucet, it forms a round droplet before falling into the sink. What property of water causes it to do this?
Temperature stability
Less dense as a solid
Good solvent
Cohesiveness
Cohesiveness
When making coffee, the various flavor compounds from the coffee grounds mix in with the water to create the liquid someone drinks. What property of water causes it do this?
Temperature stability
Less dense as a solid
Cohesiveness
Good solvent
Good solvent
When water is sucked through a straw, the straw pulls on the water below it, bringing more water up the straw. What property of water causes it to do this?
Temperature stability
Cohesiveness
Good solvent
Less dense as a solid
Cohesiveness
When heating oil in a pan, the oil gets hot very quickly, but heating water in a pan takes much longer. What property of water causes it to do this?
Cohesiveness
Good solvent
Less dense as a solid
Temperature stability
Temperature stability
During the winter, ice forms at the top of a pond while the water underneath remains a liquid.
Cohesiveness
Less dense as a solid
Temperature stability
Good solvent
Less dense as a solid
Land near large bodies of water tends to have mild climates because the water temperature does not fluctuate. This helps stabilize the climate. What property of water causes it to do this?
Good solvent
Temperature stability
Cohesiveness
Less dense as a solid
Temperature stability
