Definitions for Chemistry Labs: – Solution = liquid mixture – Titrant = solution of a known concentration. Use a burette to put the titrant into a solution (in a beaker). – Solute = minor component that is uniformly distributed in the solvent – Solvent = major component that contains the solute – Precipitate = insoluble[…]
– 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:[…]
What is mitosis? Mitosis is the process of cell division. One cell becomes two cells with full chromosomal identity. Stages of mitosis: 1. Prophase 2. Metaphase 3. Anaphase 4. Telephase Cytokinesis begins in anaphase or telephase. Cytokinesis is the division of the cytoplasm into 2 new cells.
– 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.
Types of Electronic Bonds 1. Covalent bonds – 2 or more elements share electrons (ex: H2O) 2. Ionic bonds – strongest bonding. One element takes an electron from another molecule (ex: NaCl) 3. Hydrogen bonds – weakest form of bonding. Hydrogen atom interacts with an electronegative atom like nitrogen, oxygen, or fluorine
2 trees are being studied. Tree #1 produces 20% more apples than Tree #2. If Tree #1 produces 138 apples, how many apples does Tree #2 produce?
Dovid takes an exam that he did not study for. The exam has 7 multiple choice questions. The first 5 are T/F The last 2 have 4 options each Dovid guesses on every question. Find the probability that he answers all questions correctly.
Two cars start at the same point driving in opposite directions. The slower car travels 50mph and stops 30 minutes before the faster car. The faster car travels 65 mph. How long after the slower car stops are the cars 665 miles apart?
The results of the extremely competitive math competition indicate/indicates that students need to do more work. The implication of the groups’ different projects suggest/suggests improvement is needed at the company. The student with different ideas study/studies day and night. The group of stellar athletes practice/practices together. The organizations with a female CEO show/shows growth potential.[…]
A license plate has 4 letters and 2 numbers Letters cannot be repeated but numbers can be repeated Find the probability that in a randomly selected license plate the word MATH appears.
