Prop roots
Plants such as corn have these roots
they start from over of the stem and then grow down the sink into the earth
What do plants produce when they reproduce sexually?
Spores
Pollen comes from the…
male parts of flowers
Pollination
When pollen arrives at the female part of the flower
In which part of the plants does food development start?
The ovaries
Main equation of photosynthesis
Carbon dioxide + water = Glucose + Oxygen
6CO2 + 6H2O = C6H12O6 + 6O2
Directions for photosynthesis (simplified)
- Light energy from sun is used to combine CO2 and H2O, molecules are rearranged into sugar and oxygen
- The oxygen gas is let out and the sugar is served to all parts of the plant that need matter and energy
- If sugar is left over it is combined into starch and stored
Where in the plant is sugar produced?
Leaves
Put simply how do plants grow?
They grow in groups of cells other tips called apical meristems divide into two to produce new cells
Human uses for plants
Part of ecosystem Food Medicine Clothing Building materials Stress reduction in nature Keep water clean (importance of wetlands)
Period (periodic table)
row
- move to the right (per row) heavier elements
Family/group (periodic table)
column
- have similar properties
3 components of a atom and how they are organized
- neutrons (0) in nucleus
- protons (+) in nucleus
- electrons (-) orbit around core (also have different shells) (no mass)
Covalent bond
when an electron is shared between two atoms
- strongest bonds in plant cells
Atomic number
number of protons (determines element)
Ion
an atom that has lost/gained an electron
Isotope
an atom with a different number of neutrons than a normal atom of the same element
- have different masses
Molecules
joined atoms
…. determine how atoms interact.
Electrons
Chemical bonds
the attraction that joins atoms together to form a molecule
Ionic bond
the attraction between ions of opposite charges (strong in dry environments)
Polar covalent bonds
when atoms share electrons unequally (may change the charges of different sides of molecules)
Hydrogen bonds
relatively week bonds between polar groups
- molecules are electrically sticky
Polarity
in chemical bonding, the distribution of electrical charge over the atoms joined by the bond. Specifically, while bonds between identical atoms, as in H2, are electrically uniform in the sense that both hydrogen atoms are electrically neutral, bonds between atoms of different elements are electrically inequivalent
