Advanced Definitions for ACT Biology
Monocot = flowering plant whose seeds have one embryonic leaf (cotyledon) Dicot = plant with seed with two embryonic leaves (cotyledons)
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Know the Parts of the Cell
– Cell wall: surrounds/protects cell (only in plant cells) – Cell membrane: controls movement of materials into and out of the cell (active/passive transport) – Cytoplasm: watery area of movement – Mitochondria: produces/supplies energy – Chloroplasts: contain chlorophyll (capture sunlight) [only in plants] – Vacuoles: store food/water/chemicals – Nucleus: regulars.controls cell activities – Nuclear membrane:[…]
Chem + Bio for ACT Science Section
– Higher temperatures will (usually) increase reaction rate, colder temperatures will (usually) decrease reaction rate. – Amoebas: unicellular, have a nucleus, lack cell wall – Trophic level: the higher in a food chain an organism is, the higher its trophic level is. Producers have a lower trophic level than consumers. – Accuracy vs. Precision in[…]
DNA Info for Science Section on Standardized Tests
– DNA undergoes transcription to become RNA. RNA undergoes translation to become protein. – Ribosomes contain RNA – Proteins are large molecules with smaller amino acids in them. – The nucleus of a cell contains chromosomes. The chromosomes have DNA wrapped in proteins.
The Structure of a Molecule – ACT Prep
The center of an atom is a nucleus. In the nucleus, there are 2 subatomic particles: protons (positive charge) and neutrons (neutral charge). Outside of the nucleus are electrons. The energy of an electron is in shells. An atom is a single nucleus with a positive charge surrounded by a cloud of negatively charged electrons.[…]
What is a Circuit? ACT / SAT
A circuit is a complete path that electricity flows through. There is a source of electricity (battery). Conductors are the materials that allow electric current to pass through them easily. Conductors like the positive and negative ends of a battery. In a closed circuit, the electricity flows without any interruptions. Ohm’s Law: Voltage (V); Current[…]
Math Practice
y > 4x − 2 6x > 15 Find the y-coordinates of all the points that satisfy this system of inequalities.
Example Math Problem
z(x) = 5x − 2 h(x) = 2 − 3z(x) What is the value of h(1)?
SAT & ACT Math Practice
Sample Math Problem If there are 2 hydrogens and 1 oxygen in each molecule of water, how many hydrogens are there in 89 molecules of water?
Practice Math for the SAT and ACT
On Tuesday, Jax rode 13 miles on his bike in 30 minutes. What was his average speed on that ride, to the nearest tenth?