- Label the parts of the animal cell: Nucleus, Cytoplasm, Cell Membrane.
- Define “contact” and “non-contact” forces: Contact forces require physical touch (e.g., friction, air resistance); non-contact forces act at a distance (e.g., gravity, magnetism).
- Describe weight: Weight is the force of gravity acting on an object’s mass, measured in newtons (N).
- Calculate weight on Earth: Weight = mass × gravitational field strength → 5 kg × 9.8 N/kg = 49 N.
- Define “stretch,” “compress,” “bend,” “twist”: Stretch = lengthen; compress = shorten; bend = curve; twist = rotate around axis.
- Three effects of friction on moving objects: Slows motion, generates heat, causes wear.
- Two ways to change solubility: Increase temperature (for most solids), stir or agitate the mixture.
- Match terms: Solvent → Water; Solute → Salt; Solution → Salt water.
- Process of producing salt: Evaporate seawater or brine to leave solid salt crystals behind.
- Difference between evaporate and boil: Evaporation occurs at any temperature on the surface; boiling occurs at a specific temperature throughout the liquid with bubbles.
- If you collected 10g of salt from 100g of water, solubility = 10g per 100g water.
- Chromatography principle: Separates mixtures based on how fast components travel through a medium due to differences in solubility and adhesion.
- Two uses of chromatography: Forensic analysis (ink, drugs), food industry (color additives).
Parent Tip: Review the logic above to help your child master the concept of pearson education science worksheet answers.
