Sinking Egg or Floating Egg Vocabularies Key concepts

Sinking Egg or Floating Egg

Vocabularies: Key concepts 1. Density (n) o dense (adj) < denser < densest 2. Volume (n) 3. Mass (n) 4. Solution 5. 6.

Key concept matching 1. 2. 3. 4. 5. 6. Density (n) Volume (n) Mass (n) Solution (n) a) the amount of matter in an object b) the amount of mass in a given place c) Floating in water-sinking to the bottom d) a homogeneous mixture e) the quantity of threedimensional space occupied by a liquid, solid, or gas f) decrease-increase

Sinking Egg or Floating Egg Activity : Sinking Egg or Floating Egg Objectives 1. To compare the sinking or floating of an egg when it is placed on two different types of water – water and salt water. 2. To explain the reason why the egg is floating or sinking. 3. To practice the Scientific method

Materials 1. 2 beakers 2. an egg 3. water 4. salt Methods 1. Use two beakers, pour 200 m. L of water in each and do as the followings: Beaker 1: 200 m. L water Beaker 2: 200 m. L water + 20 g salt 2. Bring the egg and place in beaker 1, and then beaker 2. 3. Observe the sinking or floating of this egg.

Experimental Diagram 5 sp. Salt 200 m. L 1 2

Hypotheses 1. If I place an egg on a saline solution or a glucose solution, then the egg will be being floated (will be floated). 2. If I place an egg on the water, the egg will be being sunk (will be sunk).

Results and Discussion water+salt water+sugar

Table 1 The sinking egg and floating egg Method 1. Water+the egg 2. Water+the egg+salt Observation of the egg

Table 1 The sinking egg and floating egg more dense Method Observation of the egg 1. Water+the egg Sung to the bottom 2. Water+the egg+salt Floated in saline water less dense

Questions 1. Why was the egg floated? Because the densities of salt water and syrup were higher compared with water. 2. Why was the egg sunk ? Because the densities of water was less dense compared with salt water and syrup.

Conclusions 1. The egg sank to the bottom of water due to its higher density compared with the water density. 2. The egg floated in the saline water due to its less density compared with the saline water density. 3. The object with less density compared with the water density will float in water.

Supplementary Knowledge 1. Daily life application: Fresh or old to bad of an egg 2. Scientific method

Scientific method

Scientific method matching A 1. Observing B a) collect data and analyze them as a supporting hypothesis or not. 2. Questioning b) set a reasonable guess to answer the question that can be tested 3. Hypothesis Setting c) communicate results to others in a final report 4. Experimenting d) watch carefully how something occurs to learn more about it 5. Data Analyzing & Concluding e) ask a problem about something you observe 6. Reporting f) conduct a fair test by changing a factor at a time.

Scientific method (cont. ) 1. 2. 3. 4. 5. 6. Observing Questioning Hypothesis Setting Experimenting Data Analyzing & Concluding Reporting

Websites/Instructional media 1. http: //www. ipst. ac. th/Flip. Book/Science/Scie nce. Textbook/Science. Middle 1 Textbook 1/files /assets/basic-html/index. html#1 2. https: //www. classroomfreebies. com/2012/0 7/scientific-method-cards. html

Vocabularies: Key concepts 1. Density (n) the amount of mass in a given place o dense (adj) < denser < densest 2. Volume (n) the quantity of three-dimensional space occupied by a liquid, solid, or gas 3. Mass (n) the amount of matter in an object 4. Solution a homogeneous mixture 5. decrease 6. floating in water increase sinking to bottom