1sT QUARTERLY EXAM

• null - no relation
• alternative - stating a relation between two variables
• "The fertilizers do not affect the plant growth." What hypothesis is this?

  Null
• Identify the kind of variable under the variable.

  A) controlled variable

  
• Identify the kind of variable under the variable.

  A) independent variable

  
• Identify the kind of variable under the variable.

  A) dependent variable

  
• Statement of the problem - first step of scientific investigation
• Analyzing data - utilizing graphs
• Physical models - can be manipulated
• conceptual model - visualized models
• mathematical models - recognize growth;make predictions
• example of physical models: Human anatomy
• example of conceptual model: Bohr's model
• example of mathematical models: Isaac Newton's Law of Gravity
• Gillen noticed that plants grow faster in soil with fertilizer than plants without fertilizer. What scientific investigation is shown?

  Making an observation
• Forming a bias is part of a scientific investigation. Reyal or Fakeh? (Kung pano spelled sa screen ayon sagot nyo)

  Fakeh
• Luis compares the results he obtained from an experimental sample against the controlled sample. WHat kind of experiment did he utilize?

  Controlled Experiment
• MJ wants to know the best type of soil for his plants. What variable should he NOT keep constant in his set-ups?

  soil
• The fertilizer was kept constant to obtain accurate and reliable results.

  
• Scientific Models predicts future events and trends. Reyal or Fakeh? (Kung pano spinell dapat ganon)

  Reyal
• If Ashley wants to make predicitons, what model should she use?

  Mathematical models
• Kylie wants to visualize and deeply understand complex systems. What scientific model should she use?

  Conceptual Model
• Matter is made up of compounds. Reyal or Fakeh?(Kung pano spinell ganon dapat)

  Fakeh
• Melting absorbs energy
• Quinn hangs up his clothes under the sun to dry. What phase change is shown?

  Evaporation
• pure substance - identical particles
• density - ratio of mass and volume
• volume - space
• we test the hypothesis by doing experiments
• mass - amount of matter in an object
• molecule - group of atoms
• freezing - liquid to solid
• melting - solid to liquid
• sublimation - solid to gas
• evaporation - liquid to gas
• condensation - gas to liquid
• deposition - gas to solid
• particles will speed up if heat is added