- Due Date 9th A: Mon. 16th
- Due Date 9th B: Tues. 17th
Please copy the following notes into your notebooks. These will be you end of the chapter review.
The Sun is not solid, nor is it a typical gas. Most atoms in the Sun exist as plasma.
- The Sun’s central core is plasma with a temperature of around 27 million°C. At such high temperatures hydrogen combines to form helium by nuclear fusion, a process that releases vast amounts of energy. This energy moves outward, towards the outer layers of the Sun.
- The energy released in the core travels extremely slowly through the radiative zone.
- In the convection zone, hot material from near the radiative zone rises, cools at the Sun’s surface, and then plunges back downward to the radiative zone. Convective movement helps to create solar flares and sunspots.
After watching this video https://www.youtube.com/watch?v=-NxfBOhQ1CY , please answer the questions found below.
- The Sun is very dense, so is there solid matter at the center? Why or why not?
- What are the inner layers of the Sun and what are their characteristics?
- What are the outer layers of the Sun and what are their characteristics?
- What powers the Sun?
For this h.w. you will cut out and paste images onto your notebook in order to represent a food web and also include a brief explanation of the trophic level present. Identify by labeling the following words in your food web.
What are the molecular weights of the following compounds?
Calculate the following:
- How many moles are in 22 grams of argon?
- How many grams are in 88.1 moles of magnesium?
- How many moles are in 2.3 grams of phosphorus?
- How many grams are in 11.9 moles of chromium?
In this month’s LOG, group 1 will explain:
- What it is?
- When was it built?
- Under who’s initiative was it designed?
- Where is it located?
- What is it used for?
- Each group will be responsible for a class presentation on their assigned topic, where they will explain whom the scientist was, what led the scientists to perform the experiment, describe what the experiment consisted of in detail, and the findings and later contributions of the experiment to the atomic structure of he atom.
- Each group will also be responsible for constructing a model that illustrates their presentation.
Group 1: J.J. Thomson’s experiments with cathode ray tubes.
Group 2: Ernest Rutherford’s gold foil experiment.
Group 3: The Rutherford experiment by Hans Geiger and Ernest Marsden that resulted in the discovery of the atomic nucleus.
Group 4: James Chadwick’s discovery of the neutron.
Group 5: Types of radiation ( Alpha, gamma, and beta)
Each group will have a class presentation explaining the assigned concepts and illustrating these with a habitat/ecosystem illustration which will be used by the group to explain the relationships and inter dependence present.
Group 1: Biodiversity, ecosystem, environment, keystone species
Group 2: Biomes, ecosystems, communities, population, individuals
Group 3: Food webs, types of producers, types of consumers,
Group 4: Aquatic and Terrestrial biomes, Abiotic and biotic factors.
Group 5: Types of niche, species that affect niches, edge effect on populations.
For this month’s LOG, group 1 will research marine biodiversity within the Dominican Republic.
- Areas where we can find the greatest variety.
- Protection agencies.
- Endangered species in specific areas.
- Food chains and habitat inter relationships.